blast_repo fixes (dart-lang/stack_trace#153)

dependabot
diff --git a/pkgs/stack_trace/.github/dependabot.yml b/pkgs/stack_trace/.github/dependabot.yml
index fb01db0..7069269 100644
--- a/pkgs/stack_trace/.github/dependabot.yml
+++ b/pkgs/stack_trace/.github/dependabot.yml
@@ -9,3 +9,7 @@
       interval: monthly
     labels:
       - autosubmit
+    groups:
+      github-actions:
+        patterns:
+          - "*"