Bump Gamesight/slack-workflow-status from 1.2.0 to 1.3.0

Bumps [Gamesight/slack-workflow-status](https://github.com/gamesight/slack-workflow-status) from 1.2.0 to 1.3.0.
- [Release notes](https://github.com/gamesight/slack-workflow-status/releases)
- [Commits](Gamesight/slack-workflow-status@v1.2.0...v1.3.0)

---
updated-dependencies:
- dependency-name: Gamesight/slack-workflow-status
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/milestone-spring-releasetrain.yml

@@ -32,7 +32,7 @@ jobs:
       actions: read
     steps:
       - name: Send Slack message
-        uses: Gamesight/slack-workflow-status@v1.2.0
+        uses: Gamesight/slack-workflow-status@v1.3.0
         with:
           repo_token: ${{ secrets.GITHUB_TOKEN }}
           slack_webhook_url: ${{ secrets.SLACK_WEBHOOK_URL }}