How do I run Github Actions in the `deployment_status` event but only for the QAS Branch?

Question

I need github actions to run only on the QAS branch and with deployment_event. At the moment I’m implementing in this way

name: Cypress

on: [deployment_status]

jobs:
  e2e:
    if: github.event.deployment_status.state == 'success'
    runs-on: ubuntu-latest

    steps:
      - name: Print URL
        run: echo Testing URL ${{ github.event.deployment_status.target_url }}

      - name: Checkout
        uses: actions/checkout@v2

      - name: Setup Node.js
        uses: actions/setup-node@v2-beta
        with:
          node-version: 14

      - name: Install modules
        run: yarn

      - name: Run Cypress
        uses: cypress-io/github-action@v2
        with:
          record: true
          parallel: true
        env:
          CYPRESS_BASE_URL: ${{ github.event.deployment_status.target_url }}
          CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

I tried that way, but it didn’t work. Here he takes into consideration the deployment_status branch independent:

name: Cypress

on:
  deployment_status:
    pull_request:
      branches:
        - qas
    push:
      branches:
        - qas

jobs:
  e2e:
    ...