docs: Link to MLA style title case (#2766)

## Changes

Update docs on writing documentation to include MLA style.

Author: SuaYoo

frontend/docs/docs/develop/docs.md

@@ -120,7 +120,7 @@ Avoid using acronyms when reuse is not frequent enough to warrant space savings.
 
 ### Headings
 
-All headings should be set in [title case](https://en.wikipedia.org/wiki/Title_case).
+All headings should be in [MLA style title case](https://capitalizemytitle.com/style/MLA/).
 
 ##### Example