Adding new topic to TOC

Author: Mattp123

powerapps-docs/maker/TOC.yml

@@ -1715,6 +1715,8 @@
           href: ./common-data-service/view-component-dependencies.md   
         - name: Use environment variables
           href: ./common-data-service/EnvironmentVariables.md
+        - name: Create a connection reference
+          href: ./common-data-service/create-connection-reference.md  
         - name: Translate customized component text
           items: 
           - name: Overview