blast_repo fixes (dart-lang/stack_trace#132)

dependabot

pkgs/stack_trace/.github/dependabot.yml

diff --git a/pkgs/stack_trace/.github/dependabot.yml b/pkgs/stack_trace/.github/dependabot.yml
index 9523511..fb01db0 100644
--- a/pkgs/stack_trace/.github/dependabot.yml
+++ b/pkgs/stack_trace/.github/dependabot.yml
@@ -7,3 +7,5 @@
     directory: /
     schedule:
       interval: monthly
+    labels:
+      - autosubmit