FIX: d-compat workflow for repos with read-only default permissions (#102)

Author: cvx

.github/workflows/d-compat-branch.yml

@@ -5,6 +5,9 @@ on:
   schedule:
     - cron: "0 0 * * *"
 
+permissions:
+  contents: write
+
 jobs:
   ci:
     uses: discourse/.github/.github/workflows/create-d-compat-branch.yml@v1