NIFI-10575 Added minimum GitHub token permissions for workflows

This closes apache#6469

Signed-off-by: David Handermann <[email protected]>
Co-authored-by: Ashish Kurmi <[email protected]>
Co-authored-by: Alex <[email protected]>

Author: 2 people

.github/workflows/ci-workflow.yml

@@ -49,6 +49,9 @@ concurrency:
   group: ${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   static-analysis:
     timeout-minutes: 30

.github/workflows/stale.yml

@@ -20,8 +20,14 @@ on:
   schedule:
     - cron: "0 0 * * *"
 
+permissions:
+  contents: read
+
 jobs:
   stale:
+    permissions:
+      issues: write  # for actions/stale to close stale issues
+      pull-requests: write  # for actions/stale to close stale PRs
     runs-on: ubuntu-latest
     steps:
       - uses: actions/stale@v3

.github/workflows/system-tests.yml

@@ -52,6 +52,9 @@ env:
     -pl nifi-system-tests/nifi-system-test-suite
     -pl nifi-system-tests/nifi-stateless-system-test-suite
 
+permissions:
+  contents: read
+
 jobs:
   ubuntu-17:
     timeout-minutes: 120