Update coverage.yml

Author: grahamgilbert

.github/workflows/coverage.yml

@@ -6,6 +6,8 @@ jobs:
   coverage:
 
     runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
     steps:
       - uses: actions/checkout@v3
 
@@ -25,4 +27,4 @@ jobs:
           coverage-files: coverage/lcov.info
           minimum-coverage: 40
           github-token: ${{ secrets.GITHUB_TOKEN }}
-          update-comment: true
+          update-comment: true