Update toc.yml

remove en-us

Author: v-albemi

articles/spring-cloud/toc.yml

@@ -77,4 +77,4 @@
     - name: Troubleshooting Guide
       href: spring-cloud-troubleshoot.md
     - name: REST API reference
-      href: https://docs.microsoft.com/en-us/rest/api/azurespringclould/
+      href: https://docs.microsoft.com/rest/api/azurespringclould/