build(deps): bump elastic/oblt-actions

Bumps [elastic/oblt-actions](https://github.com/elastic/oblt-actions) from 1.11.1 to 1.12.0.
- [Release notes](https://github.com/elastic/oblt-actions/releases)
- [Changelog](https://github.com/elastic/oblt-actions/blob/main/docs/RELEASE.md)
- [Commits](v1.11.1...v1.12.0)

---
updated-dependencies:
- dependency-name: elastic/oblt-actions
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

oblt-cli/cluster-create-serverless/action.yml

@@ -80,7 +80,7 @@ runs:
         target: ${{ inputs.target }}
         project_type: ${{ inputs.project-type }}
 
-    - uses: elastic/oblt-actions/oblt-cli/setup@v1.11.1
+    - uses: elastic/oblt-actions/oblt-cli/setup@v1.12.0
       with:
         github-token: ${{ inputs.github-token }}
         slack-channel: ${{ inputs.slack-channel }}