Add link to MLKit support

Author: samtstern

.github/ISSUE_TEMPLATE/config.yml

@@ -3,6 +3,9 @@ contact_links:
   - name: 🐞 Bug in the Firebase SDK
     url: https://github.com/firebase/firebase-android-sdk/issues/new/choose
     about: Do you think you have found a bug in the Firebase Android SDK?
+  - name: 🤖 MLKit On-Device Issues
+    url: https://github.com/googlesamples/mlkit
+    about: The MLKit on-device SDK has moved out of Firebase and the best place to get support is on their samples repository.
   - name: 🔥 Firebase Support
     url: https://firebase.google.com/support/
     about: If you have an urgent issue with your app, please contact support.