blast_repo fixes (dart-lang/source_span#111)

dependabot

pkgs/source_span/.github/dependabot.yml

diff --git a/pkgs/source_span/.github/dependabot.yml b/pkgs/source_span/.github/dependabot.yml
index c6531d4..eeaa9d9 100644
--- a/pkgs/source_span/.github/dependabot.yml
+++ b/pkgs/source_span/.github/dependabot.yml
@@ -10,3 +10,7 @@
     interval: monthly
   labels:
     - autosubmit
+  groups:
+    github-actions:
+      patterns:
+        - "*"