chore: pr label token permission (#246)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Improvements**
- Enhanced permissions for pull request workflows to improve security
and functionality.
- Standardized the authentication method for labeling pull requests by
using the `GITHUB_TOKEN`.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/lint-pr.yml

@@ -8,13 +8,17 @@ jobs:
   lint-pr-name:
     name: Validate PR title
     runs-on: ubuntu-latest
+    permissions:
+      pull-requests: read
     steps:
       - uses: amannn/action-semantic-pull-request@v5
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
   label-pr:
     runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
     steps:
       - uses: grafana/[email protected]
         with:
-          token: ${{ secrets.MIDEA_GITHUB_PAT }}
+          token: ${{ secrets.GITHUB_TOKEN }}