我有一个github工作流步骤，如果有人合并了shuklsh-test-1的拉取请求，我会创建一个针对shuklsh-test-2分支的自动拉取请求。

steps:
      - name: Checkout repo
        uses: actions/checkout@v2
        with:
          token: ${{ secrets.AUTO_COMMIT_BOT_PAT }}
      - name: Create automated PR
        if: github.event_name == 'pull_request' && github.event.action == 'closed' && github.event.pull_request.merged == true && ${{ github.base_ref == 'shuklsh-test-1' }}
        uses: peter-evans/create-pull-request@v4
        with:
          token: ${{ secrets.AUTO_COMMIT_BOT_PAT }}
          title: ${{ github.event.pull_request.title }}
          body: ${{ github.event.pull_request.body }}
          base: shuklsh-test-2
          branch: ${{ github.base_ref }}
          labels: Automated PR

我正在分支shuklsh-test-1的上下文中运行工作流。工作流FAILS在此步骤中出现以下错误。

invalid refspec ':refs/remotes/origin'

我错过了什么？