Merge pull request #1420 from github/mbg/dependabot/rebuild

Add "Rebuild" label to Dependabot PRs for `npm`

Author: mbg

.github/dependabot.yml

@@ -26,6 +26,8 @@ updates:
       default-days: 7
       exclude:
         - "@actions/*"
+    labels:
+      - "Rebuild"
     groups:
       actions:
         patterns: