Update validate.yml work job permissions

Author: hspaans

.github/workflows/validate.yml

@@ -7,6 +7,9 @@ on:
 jobs:
   validate:
     runs-on: ubuntu-24.04
+    permissions:
+      contents: read
+      pull-requests: write
     steps:
       - name: Checkout Code
         uses: actions/checkout@v4