GitHub Workflows security hardening (#10456)

* build: harden lock.yml permissions

Signed-off-by: Alex <aleksandrosansan@gmail.com>

* build: harden stale.yml permissions

Signed-off-by: Alex <aleksandrosansan@gmail.com>

* build: harden ci.yml permissions

Signed-off-by: Alex <aleksandrosansan@gmail.com>

Signed-off-by: Alex <aleksandrosansan@gmail.com>

.github/workflows/ci.yml

@@ -1,5 +1,7 @@
 name: CI
 on: [push, pull_request]
+permissions:
+  contents: read # to fetch code (actions/checkout)
 jobs:
   build:
     runs-on: ubuntu-latest

.github/workflows/lock.yml

@@ -5,8 +5,13 @@ on:
   schedule:
     - cron: '0 3 * * *'
 
+permissions: {}
 jobs:
   lock:
+    permissions:
+      issues: write # to lock issues (dessant/lock-threads)
+      pull-requests: write # to lock PRs (dessant/lock-threads)
+
     runs-on: ubuntu-latest
     steps:
       - uses: dessant/lock-threads@v3

.github/workflows/stale.yml

@@ -4,8 +4,13 @@ on:
   schedule:
     - cron: '0 4 * * *'
 
+permissions: {}
 jobs:
   stale:
+    permissions:
+      issues: write # to close stale issues (actions/stale)
+      pull-requests: write # to close stale PRs (actions/stale)
+
     runs-on: ubuntu-latest
     steps:
       - uses: actions/stale@v5