build(deps): bump softprops/action-gh-release from 1 to 2 (#6651)

Bumps [softprops/action-gh-release](https://github.com/softprops/action-gh-release) from 1 to 2.
- [Release notes](https://github.com/softprops/action-gh-release/releases)
- [Changelog](https://github.com/softprops/action-gh-release/blob/master/CHANGELOG.md)
- [Commits](softprops/action-gh-release@v1...v2)

---
updated-dependencies:
- dependency-name: softprops/action-gh-release
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/helm-release.yml

@@ -132,7 +132,7 @@ jobs:
       # The tag name in grafana/helm-charts is <package>-<version>, while the
       # tag name for grafana/agent is helm-chart/<version>.
       - name: Make github release
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@v2
         with:
           name: ${{ steps.parse-chart.outputs.packagename }}
           repository: grafana/helm-charts