Bump grafana/k6-action from 0.3.0 to 0.3.1

Bumps [grafana/k6-action](https://github.com/grafana/k6-action) from 0.3.0 to 0.3.1.
- [Release notes](https://github.com/grafana/k6-action/releases)
- [Commits](grafana/k6-action@v0.3.0...v0.3.1)

---
updated-dependencies:
- dependency-name: grafana/k6-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/load-tests.yml

@@ -28,7 +28,7 @@ jobs:
           token: ${{ secrets.REPOSITORY_DISPATCH_TOKEN }}
 
       - name: Run local k6 test
-        uses: grafana/[email protected].0
+        uses: grafana/[email protected].1
         with:
           filename: load-tests/test_cases.js
           flags: --out json=results.json