Bump softprops/action-gh-release from 1 to 2

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] <support@github.com>

Author: dependabot[bot]

.github/workflows/prepare-release.yaml

@@ -30,7 +30,7 @@ jobs:
           printf '\n-----\n\n' >> release_notes.txt
           awk -f .github/workflows/changelog.awk CHANGELOG.md >> release_notes.txt
       - name: Release
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@v2
         with:
           draft: true
           body_path: release_notes.txt