Fix filename in contributing navigation

Corrected the filename from 'Updating the API documentation.md' to 'Updating-the-API-documentation.md' in the docs/Contributing/.pages navigation to ensure proper linking.

Author: IsakNaslundBh

docs/Contributing/.pages

@@ -1,7 +1,7 @@
 nav:
     - index.md
     - Editing-the-documentation.md
-    - Updating the API documentation.md
+    - Updating-the-API-documentation.md
     - Submitting-an-Issue.md
     - Resolving-an-Issue.md
     - Pull-Requests.md