label-actions: Add canned response for upgrade issues

Summary:
Enhance the label-actions config and support a "Type: Upgrade Issue" label.
- Point to the Upgrade Support repository whenever the Type: Upgrade Issue label is applied.
- Close the issue.

Changelog:
[Internal] label-actions: Add canned response for upgrade issues

Reviewed By: cpojer

Differential Revision: D20974607

fbshipit-source-id: 3cd7890aaeb1e57baf2acc5ca85a9b3ae5117c56

.github/label-actions.yml

@@ -10,6 +10,10 @@
   comment: >
     Please report documentation issues in the [`react-native-website`](https://github.com/facebook/react-native-website/issues) repository.
   close: true
+"Type: Upgrade Issue":
+  comment: >
+    Do you need help upgrading to a newer React Native version? Visit the [Upgrade Support repository](https://github.com/react-native-community/upgrade-support) or use the [upgrade helper](https://react-native-community.github.io/upgrade-helper/) to see the changes that need to be made to upgrade your app.
+  close: true
 "Resolution: For Stack Overflow":
   comment: >
     We are using GitHub issues exclusively to track bugs in the core React Native library. Please try asking over on [Stack Overflow](http://stackoverflow.com/questions/tagged/react-native) as it is better suited for this type of question.