Disable dependentbot (#196)

Author: kezhenxu94

.asf.yaml

@@ -28,6 +28,7 @@ github:
     squash: true
     merge: false
     rebase: false
+  dependabot_updates: false
   protected_branches:
     master:
       required_status_checks:
@@ -36,4 +37,4 @@ github:
           - Required
       required_pull_request_reviews:
         dismiss_stale_reviews: true
-        required_approving_review_count: 1
+        required_approving_review_count: 1