Bump slackapi/slack-github-action from 1.26.0 to 1.27.0 in /.github/workflows (#15945)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/docker.yaml

@@ -175,7 +175,7 @@ jobs:
 
       - name: Notify on failure
         if: github.event_name == 'push' && failure() # do not notify on cancelled() as cancelling is performed by hand
-        uses: slackapi/slack-github-action@v1.26.0
+        uses: slackapi/slack-github-action@v1.27.0
         with:
           payload: |
             {"text": "<!channel> GitHub Actions error for ${{ github.workflow }} ❌\n\n\n*Repository:* https://github.com/${{ github.repository }}\n*Action:* https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}\n*Author:* ${{ github.actor }}\n*Event:* ${{ github.event_name }}\n"}