Fix danger-comment workflow permissions

Author: dblock

.github/workflows/danger-comment.yml

@@ -5,6 +5,11 @@ on:
     workflows: [Danger]
     types: [completed]
 
+permissions:
+  actions: read
+  issues: write
+  pull-requests: write
+
 jobs:
   comment:
     uses: numbata/danger-pr-comment/.github/workflows/danger-comment.yml@v0.1.0