Bump slackapi/slack-github-action from 2.1.1 to 3.0.1

Bumps [slackapi/slack-github-action](https://github.com/slackapi/slack-github-action) from 2.1.1 to 3.0.1.
- [Release notes](https://github.com/slackapi/slack-github-action/releases)
- [Commits](slackapi/slack-github-action@v2.1.1...v3.0.1)

---
updated-dependencies:
- dependency-name: slackapi/slack-github-action
  dependency-version: 3.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/moby-latest.yml

@@ -50,7 +50,7 @@ jobs:
       - name: Notify to Slack on failures
         if: failure()
         id: slack
-        uses: slackapi/slack-github-action@v2.1.1
+        uses: slackapi/slack-github-action@v3.0.1
         with:
           payload: |
             {