Bump grafana/shared-workflows/actions/send-slack-message@send-slack-message/v2.0.3 from 2.0.3 to 2.0.4 (#112317)

Bump grafana/shared-workflows/actions/send-slack-message@send-slack-message/v2.0.3

Bumps [grafana/shared-workflows/actions/send-slack-message@send-slack-message/v2.0.3](https://github.com/grafana/shared-workflows) from 2.0.3 to 2.0.4.
- [Release notes](https://github.com/grafana/shared-workflows/releases)
- [Changelog](https://github.com/grafana/shared-workflows/blob/main/release-please-config.json)
- [Commits](https://github.com/grafana/shared-workflows/compare/send-slack-message/v2.0.3...send-slack-message/v2.0.4)

---
updated-dependencies:
- dependency-name: grafana/shared-workflows/actions/send-slack-message@send-slack-message/v2.0.3
  dependency-version: 2.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/alerting-update-module.yml

@@ -148,7 +148,7 @@ jobs:
             echo "🔗 [View Pull Request]($PR_URL)"
           } >> "$GITHUB_STEP_SUMMARY"
       - name: Send Slack Message
-        uses: grafana/shared-workflows/actions/send-slack-message@send-slack-message/v2.0.3
+        uses: grafana/shared-workflows/actions/send-slack-message@send-slack-message/v2.0.4
         with:
           method: 'chat.postMessage'
           # send to alerting-reviews channel