Merge pull request #2065 from kannon92/seedling-dependabot

🌱 seedling to dependabot

Author: k8s-ci-robot

.github/dependabot.yml

@@ -23,5 +23,7 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+    commit-message:
+      prefix: ":seedling:"
     labels:
       - "ok-to-test"