blast_repo fixes (dart-lang/watcher#146)

dependabot

pkgs/watcher/.github/dependabot.yaml

diff --git a/pkgs/watcher/.github/dependabot.yaml b/pkgs/watcher/.github/dependabot.yaml
index 2144819..439e796 100644
--- a/pkgs/watcher/.github/dependabot.yaml
+++ b/pkgs/watcher/.github/dependabot.yaml
@@ -2,7 +2,9 @@
 version: 2
 
 updates:
-  - package-ecosystem: "github-actions"
-    directory: "/"
+  - package-ecosystem: github-actions
+    directory: /
     schedule:
-      interval: "monthly"
+      interval: monthly
+    labels:
+      - autosubmit