blast_repo fixes (dart-lang/browser_launcher#45)

dependabot
diff --git a/pkgs/browser_launcher/.github/dependabot.yml b/pkgs/browser_launcher/.github/dependabot.yml
index e7af801..8184a38 100644
--- a/pkgs/browser_launcher/.github/dependabot.yml
+++ b/pkgs/browser_launcher/.github/dependabot.yml
@@ -3,7 +3,9 @@
 version: 2
 updates:
 
-- package-ecosystem: "github-actions"
-  directory: "/"
+- package-ecosystem: github-actions
+  directory: /
   schedule:
-    interval: "monthly"
+    interval: monthly
+  labels:
+    - autosubmit