chore(deps): update peter-evans/create-pull-request action to v6

Author: renovate[bot]

.github/workflows/send-pr.yml

@@ -40,7 +40,7 @@ jobs:
 
  - name: "Create Pull Request"
  id: create-pr
- uses: peter-evans/create-pull-request@v5
+ uses: peter-evans/create-pull-request@v6
  with:
  token: ${{ secrets.PHPSTAN_BOT_TOKEN }}
  path: ./phpstan-src