Update claude-fix-issue.yml

Author: ondrejmirtes

.github/workflows/claude-fix-issue.yml

@@ -184,6 +184,7 @@ jobs:
           branch-token: ${{ secrets.PHPSTAN_BOT_FORK_TOKEN }}
           token: ${{ secrets.PHPSTAN_BOT_PR_TOKEN }}
           push-to-fork: phpstan-bot/phpstan-src
+          maintainer-can-modify: false
           branch-suffix: random
           delete-branch: true
           title: "Fix #${{ inputs.issue-number }}: ${{ steps.issue.outputs.title }}"