Bump slackapi/slack-github-action from 1.27.0 to 2.0.0 (#39)

Bumps [slackapi/slack-github-action](https://github.com/slackapi/slack-github-action) from 1.27.0 to 2.0.0.
- [Release notes](https://github.com/slackapi/slack-github-action/releases)
- [Commits](slackapi/slack-github-action@v1.27.0...v2.0.0)

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

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

.github/workflows/govulncheck.yml

@@ -26,7 +26,7 @@ jobs:
           go-package: ./...
 
       - name: Send Slack message
-        uses: slackapi/slack-github-action@v1.27.0
+        uses: slackapi/slack-github-action@v2.0.0
         if: ${{ failure() && steps.govulncheck.conclusion == 'failure' && github.ref == 'refs/heads/main' }}
         with:
           payload: |