blast_repo fixes (dart-lang/string_scanner#58)

dependabot

pkgs/string_scanner/.github/dependabot.yml

diff --git a/pkgs/string_scanner/.github/dependabot.yml b/pkgs/string_scanner/.github/dependabot.yml
index d5262be..c84404d 100644
--- a/pkgs/string_scanner/.github/dependabot.yml
+++ b/pkgs/string_scanner/.github/dependabot.yml
@@ -4,8 +4,9 @@
 version: 2
 updates:
 
-- package-ecosystem: "github-actions"
-  directory: "/"
+- package-ecosystem: github-actions
+  directory: /
   schedule:
-    # Check for updates to GitHub Actions every weekday
-    interval: "monthly"
+    interval: monthly
+  labels:
+    - autosubmit