Add syntax languages to Presets.

Presets.md

@@ -6,14 +6,14 @@ Factory module presets are a great tool for teaching and inspiring users of your
 They store parameter values, as well as internal data from your `Module::dataToJson()` method if overridden.
 
 To include a factory module preset in your module, save a module preset file (`.vcvm`) to
-```
+```txt
 <your plugin's root dir>/presets/<module slug>/<preset name>.vcvm
 ```
 
 Module presets are sorted alphabetically by filename.
 However, (since Rack 2) if a filename begins with numerical digits followed by `_` (regex `/^\d+_/`), that prefix is not displayed to the user, so you can apply your own custom preset sorting order.
 For example, the above screenshot uses the following preset filenames.
-```
+```txt
 /presets/DrumMachine/00_House.vcvm
 /presets/DrumMachine/01_House 2.vcvm
 /presets/DrumMachine/02_Techno.vcvm
@@ -24,7 +24,7 @@ For example, the above screenshot uses the following preset filenames.
 
 Presets can be edited with a text editor to update only a subset of parameters.
 For example, to change parameters #0 and #2 but leave #1 unchanged, remove the `"param"` object with `id` 1.
-```
+```json
   "params": [
     {
       "id": 0,