Update LOCAL_DEVELOPMENT.md (#3808)

fix json formatting to not have big red comment blocks

## What type of PR is this? (check all applicable)

- [ ] Refactor
- [ ] Feature
- [ ] Bug Fix
- [ ] Optimization
- [X] Documentation Update


## Have you discussed this change with the InvokeAI team?
- [ ] Yes
- [X] No, because: simple docs fix

      
## Description

Fix LOCAL_DEVELOPMENT.md json comment highlighting

## Related Tickets & Documents

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- Related Issue # n/a
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## QA Instructions, Screenshots, Recordings

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## Added/updated tests?

- [ ] Yes
- [x] No : simple docs change

docs/contributing/LOCAL_DEVELOPMENT.md

@@ -125,7 +125,7 @@ To make a workspace:
 
 Should look something like this:
 
-```json
+```jsonc
 {
   // I like to have all InvokeAI-related folders in my workspace
   "folders": [
@@ -164,7 +164,7 @@ to set up your `launch.json` and try it out.
 
 Now we can create the InvokeAI debugging configs:
 
-```json
+```jsonc
 {
   // Use IntelliSense to learn about possible attributes.
   // Hover to view descriptions of existing attributes.