Adding the GH action permission to entire workflow

- Update the content permission to `write` for testTKG joob

Signed-off-by: Anna Babu Palathingal <[email protected]>

.github/workflows/testTKG.yml

@@ -2,12 +2,12 @@ name: "Run TKG Tests"
 on:
   issue_comment:
     types: [created]
+permissions:
+    contents: write
+    issues: write
+    pull-requests: write
 jobs:
   testTKG:
-    permissions:
-        contents: read
-        issues: write
-        pull-requests: write
     runs-on: ubuntu-latest
     if: startsWith(github.event.comment.body, 'run tkg-test')
     steps: