Add Metro repo link to new GitHub issue flow (#38072)

Summary:
Pull Request resolved: #38072

Changelog: None

Reviewed By: cortinico

Differential Revision: D47024223

fbshipit-source-id: c29ae1fe7b17cd0182cb865aa398c870d86cf80d

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,9 @@
 blank_issues_enabled: false
 contact_links:
+    - name: 📦 Metro Issue
+      url: https://github.com/facebook/metro/issues/new
+      about: |
+        If you've encountered a module resolution problem, e.g. "Error: Unable to resolve module ...", or something else that might be related to Metro, please open an issue in the Metro repo instead.
     - name: 📃 Documentation Issue
       url: https://github.com/facebook/react-native-website/issues
       about: Please report documentation issues in the React Native website repository.