Tanvi k/yml changes (#15)

* Added test-page in yml

* updated slug with file name

Author: TanviK-ddn

fern/docs/pages/test-page.mdx

@@ -4,7 +4,7 @@ subtitle: |-
   This is a Test Line.
 
   Everything you need to build the best developer experience
-slug: welcome
+slug: test-page
 ---
 
 This is exclusively created for practising Git workflow.