Fix wording in Unified routing section for clarity

Author: neeranelli

support/dynamics-365/customer-service/toc.yml

@@ -170,7 +170,7 @@
       href: teams-collaboration/flow-connection-invalid-customer-support-swarming.md
 - name: Unified routing
   items:
-    - name: Troubleshoot enabling unified routing
+    - name: Troubleshoot enabling of unified routing
       href: unified-routing/troubleshoot-enabling-unified-routing.md
     - name: Troubleshoot issues with automatic assignment
       href: unified-routing/troubleshoot-assignment-issues.md