Bump softprops/action-gh-release from 1 to 2 (#1007)

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/release.yml

@@ -20,7 +20,7 @@ jobs:
       - id: docker_tag
         run: echo "DOCKER_TAG=${GITHUB_REF_NAME#v}" >> "$GITHUB_ENV"
       - name: Release
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@v2
         with:
           body: |
             This is release `${{ env.GITHUB_REF_NAME }}` of Tanka (`tk`). Check out the [CHANGELOG](https://github.com/grafana/tanka/blob/main/CHANGELOG.md) for detailed release notes.