modifying name for Functions TOC node

Author: Mukta Batra

articles/azure-functions/TOC.yml

@@ -403,7 +403,7 @@
         - name: Manage a function app
           href: functions-how-to-use-azure-function-app-settings.md
           displayName: app setting, application setting
-        - name: Reference app settings from App Configuration (preview)
+        - name: Reference function app settings from App Configuration (preview)
           href: app-service-app-config-references.md
         - name: Set the runtime version
           href: set-runtime-version.md