Apply suggestions from code review

Co-authored-by: Michael  <[email protected]>

Author: alexwolfmsft

zone-pivots/zone-pivot-groups.yml

@@ -1046,4 +1046,4 @@ groups:
   - id: programming-language-csharp
     title: C#
   - id: programming-language-rest
-    title: rest
+    title: REST