Bump slackapi/slack-github-action from 2 to 3 (#579)

Bumps [slackapi/slack-github-action](https://github.com/slackapi/slack-github-action) from 2 to 3.
- [Release notes](https://github.com/slackapi/slack-github-action/releases)
- [Commits](slackapi/slack-github-action@v2...v3)

---
updated-dependencies:
- dependency-name: slackapi/slack-github-action
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/smoke-test.yml

@@ -45,7 +45,7 @@ jobs:
     - name: Send status to Slack app
       if: ${{ failure() && github.event_name != 'workflow_dispatch' }}
       id: slack
-      uses: slackapi/slack-github-action@v2
+      uses: slackapi/slack-github-action@v3
       with:
         webhook: ${{ secrets.SLACK_WEBHOOK_URL }}
         webhook-type: webhook-trigger