blast_repo fixes (dart-lang/source_maps#92)

dependabot

pkgs/source_maps/.github/dependabot.yaml

diff --git a/pkgs/source_maps/.github/dependabot.yaml b/pkgs/source_maps/.github/dependabot.yaml
index 439e796..bf6b38a 100644
--- a/pkgs/source_maps/.github/dependabot.yaml
+++ b/pkgs/source_maps/.github/dependabot.yaml
@@ -8,3 +8,7 @@
       interval: monthly
     labels:
       - autosubmit
+    groups:
+      github-actions:
+        patterns:
+          - "*"