Specify job permissions in the pull request workflow

.github/workflows/pull-request-verification.yml

@@ -17,6 +17,8 @@ jobs:
 
   test-inline:
     runs-on: ubuntu-latest
+    permissions:
+      pull-requests: read
     steps:
     - uses: actions/checkout@v3
     - uses: ./
@@ -36,6 +38,8 @@ jobs:
 
   test-external:
     runs-on: ubuntu-latest
+    permissions:
+      pull-requests: read
     steps:
     - uses: actions/checkout@v3
     - uses: ./