blast_repo fixes (dart-lang/string_scanner#73)

dependabot

pkgs/string_scanner/.github/dependabot.yml

diff --git a/pkgs/string_scanner/.github/dependabot.yml b/pkgs/string_scanner/.github/dependabot.yml
index c84404d..a19a66a 100644
--- a/pkgs/string_scanner/.github/dependabot.yml
+++ b/pkgs/string_scanner/.github/dependabot.yml
@@ -10,3 +10,7 @@
     interval: monthly
   labels:
     - autosubmit
+  groups:
+    github-actions:
+      patterns:
+        - "*"