Generate collaboration page from homepage link

Author: vahidzee

index.yml

@@ -83,7 +83,7 @@ collaboration:
     website by hand. Contributions are welcome around templates, examples,
     notebook rendering, documentation patterns, and repository workflows.
 
-    See the [collaboration page](/pages/collaboration.html) for concrete ways
+    See the [collaboration page](md=pages/collaboration.md) for concrete ways
     to help the project, share feedback, or shape useful extension examples.
 
     The website itself is intentionally small and source-driven, so it can be