Fix broken pages due to unknown language for syntax highlighting

Signed-off-by: Marcel Ribeiro-Dantas <mribeirodantas@seqera.io>

hjson.html.markdown

@@ -15,7 +15,7 @@ to read and edit before passing the JSON data to the machine.
 
 Let's take a look at examples to see the key syntax differences!
 
-```hjson
+```
 {
     # Comments are totally supported!
     

lbstanza.html.markdown

@@ -8,7 +8,7 @@ contributors:
 LB Stanza (or Stanza for short) is a new optionally-typed general purpose programming language from the University of California, Berkeley. Stanza was designed to help programmers tackle the complexity of architecting large programs and significantly increase the productivity of application programmers across the entire software development life cycle.
 
 
-```stanza
+```
 ; this is a comment 
 ;<A>
 This is a block comment 
@@ -268,7 +268,7 @@ is-there = any?({_ == 2.0}, numbers)
 doc: \<doc>
     # Document Strings 
 
-    ```stanza
+    ```
     val you-can = "include code snippets, too" 
     ```
 

openscad.html.markdown

@@ -7,7 +7,7 @@ contributors:
 
 Draw 3D models with code using [OpenSCAD](https://openscad.org/).
 
-```openscad
+```
 // Comments look like this
 
 // 3D Primitives

zig.html.markdown

@@ -39,7 +39,7 @@ Prior knowledge of C is recommended.
 ## Zig language
 
 
-```zig
+```
 //! Top-level documentation.
 
 /// Documentation comment.
@@ -49,7 +49,7 @@ Prior knowledge of C is recommended.
 
 
 ### Hello world.
-```zig
+```
 // Import standard library, reachable through the "std" constant.
 const std = @import("std");
 
@@ -67,7 +67,7 @@ pub fn main() void {
 ```
 
 ### Booleans, integers and float.
-```zig
+```
 // Booleans.
 // Keywords are preferred to operators for boolean operations.
 print("{}\n{}\n{}\n", .{
@@ -109,7 +109,7 @@ i <<| 8   == 255   // u8: won't go higher than 255
 ```
 
 ### Arrays.
-```zig
+```
 // An array is a well-defined structure with a length attribute (len).
 
 // 5-byte array with undefined content (stack garbage).
@@ -156,7 +156,7 @@ try some_integers[i]; // Runtime error 'index out of bounds'.
 ```
 
 ### Multidimensional arrays.
-```zig
+```
 
 const mat4x4 = [4][4]f32{
     [_]f32{ 1.0, 0.0, 0.0, 0.0 },
@@ -177,7 +177,7 @@ for (mat4x4) |row, row_index| {
 ```
 
 ### Strings.
-```zig
+```
 
 // Simple string constant.
 const greetings = "hello";
@@ -195,7 +195,7 @@ print("string: {s}\n", .{greetings});
 ```
 
 ### Slices.
-```zig
+```
 
 // A slice is a pointer and a size, an array without compile-time known size.
 // Slices have runtime out-of-band verifications.
@@ -206,7 +206,7 @@ const slice = array[0..array.len];  // "slice" represents the whole array.
 ```
 
 ### Pointers.
-```zig
+```
 
 // Pointer on a value can be created with "&".
 const x: i32 = 1;
@@ -223,7 +223,7 @@ const foo = pointer.?; // Get the pointed value, otherwise crash.
 ```
 
 ### Optional values (?<type>).
-```zig
+```
 // An optional is a value than can be of any type or null.
 
 // Example: "optional_value" can either be "null" or an unsigned 32-bit integer.
@@ -239,7 +239,7 @@ if (x) |value| {
 ```
 
 ### Errors.
-```zig
+```
 // Zig provides an unified way to express errors.
 
 // Errors are defined in error enumerations, example:
@@ -299,7 +299,7 @@ var value = try some_function();
 
 ### Control flow.
 
-```zig
+```
 // Conditional branching.
 
 if (condition) {
@@ -384,7 +384,7 @@ const result = for (items) |value| {
 ```
 
 ### Labels.
-```zig
+```
 
 // Labels are a way to name an instruction, a location in the code.
 // Labels can be used to "continue" or "break" in a nested loop.
@@ -434,7 +434,7 @@ const result = for (items) |value| { // First: loop.
 ```
 
 ### Switch.
-```zig
+```
 
 // As a switch in C, but slightly more advanced.
 // Syntax:
@@ -461,7 +461,7 @@ const bar = switch (foo) {
 ```
 
 ### Structures.
-```zig
+```
 
 // Structure containing a single value.
 const Full = struct {
@@ -564,7 +564,7 @@ print("p.y: {}\n", .{p.y}); // 30
 ```
 
 ### Tuples.
-```zig
+```
 // A tuple is a list of elements, possibly of different types.
 
 const foo = .{ "hello", true, 42 };
@@ -572,7 +572,7 @@ const foo = .{ "hello", true, 42 };
 ```
 
 ### Enumerations.
-```zig
+```
 
 const Type = enum { ok, not_ok };
 
@@ -606,7 +606,7 @@ const x = switch (direction) {
 ```
 
 ### Unions.
-```zig
+```
 
 const Bar = union {
   boolean: bool,
@@ -622,7 +622,7 @@ const foo: Bar = .{ .int = 42 };
 ```
 
 ### Tagged unions.
-```zig
+```
 
 // Unions can be declared with an enum tag type, allowing them to be used in
 // switch expressions.
@@ -653,7 +653,7 @@ switch (nay) {
 ```
 
 ### Defer and errdefer.
-```zig
+```
 
 // Make sure that an action (single instruction or block of code) is executed
 // before the end of the scope (function, block of code).
@@ -712,7 +712,7 @@ However, here are some examples, to get an idea of what you can expect:
   Very simple way of avoiding leaks.
 
 A first example.
-```zig
+```
 // "!void" means the function doesn't return any value except for errors.
 // In this case we try to allocate memory, and this may fail.
 fn foo() !void {
@@ -735,7 +735,7 @@ fn foo() !void {
 ```
 
 ### Memory allocation combined with error management and defer.
-```zig
+```
 
 fn some_memory_allocation_example() !void {
     // Memory allocation may fail, so we "try" to allocate the memory and
@@ -759,7 +759,7 @@ fn some_memory_allocation_example() !void {
 ```
 
 ### Memory allocators: a taste of the standard library.
-```zig
+```
 
 // Allocators: 4 main functions to know
 //   single_value = create (type)
@@ -846,7 +846,7 @@ fn gpa_arena_allocator_fn() !void {
 ```
 
 ### Comptime.
-```zig
+```
 
 // Comptime is a way to avoid the pre-processor.
 // The idea is simple: run code at compilation.
@@ -883,7 +883,7 @@ list.items[0] = 10;
 ```
 
 ### Conditional compilation.
-```zig
+```
 const available_os = enum { OpenBSD, Linux };
 const myos = available_os.OpenBSD;
 
@@ -905,7 +905,7 @@ const myprint = switch(myos) {
 ```
 
 ### Testing our functions.
-```zig
+```
 const std = @import("std");
 const expect = std.testing.expect;
 
@@ -936,7 +936,7 @@ There are more than a hundred built-ins, allowing very low-level stuff:
 - etc.
 
 Example: enums aren't integers, they have to be converted with a built-in.
-```zig
+```
 const Value = enum { zero, stuff, blah };
 if (@enumToInt(Value.zero)  == 0) { ... }
 if (@enumToInt(Value.stuff) == 1) { ... }