Fix link

Author: Steve Danielson

release-notes/docswhatsnew/toc.yml

@@ -3,7 +3,7 @@
 - name: May 2025
   href: ./azure-devops-docs-whats-new.md
 - name: April 2025
-  href: ./azure-devops-docs-2025-03.md
+  href: ./azure-devops-docs-2025-04.md
 - name: March 2025
   href: ./azure-devops-docs-2025-03.md