Bump slackapi/slack-github-action from 1 to 2

Bumps [slackapi/slack-github-action](https://github.com/slackapi/slack-github-action) from 1 to 2.
- [Release notes](https://github.com/slackapi/slack-github-action/releases)
- [Commits](slackapi/slack-github-action@v1...v2)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/smoke-test.yml

@@ -42,7 +42,7 @@ jobs:
     - name: Send status to Slack app
       if: ${{ failure() && github.event_name != 'workflow_dispatch' }}
       id: slack
-      uses: slackapi/slack-github-action@v1
+      uses: slackapi/slack-github-action@v2
       with:
         # For posting a rich message using Block Kit
         payload: |