chore: 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-version: '2'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/bump-v1-tag.yaml

@@ -22,7 +22,7 @@ jobs:
           git push origin v1 --force
 
       - name: Send Slack notification on success
-        uses: slackapi/slack-github-action@v1
+        uses: slackapi/slack-github-action@v2
         with:
           payload: |
             {