Bump softprops/action-gh-release from 2.0.3 to 2.0.4 (#1220)

Bumps [softprops/action-gh-release](https://github.com/softprops/action-gh-release) from 2.0.3 to 2.0.4.
- [Release notes](https://github.com/softprops/action-gh-release/releases)
- [Changelog](https://github.com/softprops/action-gh-release/blob/master/CHANGELOG.md)
- [Commits](https://github.com/softprops/action-gh-release/compare/v2.0.3...v2.0.4)

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

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

.github/workflows/release.yml

@@ -101,7 +101,7 @@ jobs:
           inputs: ./echidna-*.tar.gz
 
       - name: Create GitHub release and upload binaries
-        uses: softprops/action-gh-release@v2.0.3
+        uses: softprops/action-gh-release@v2.0.4
         with:
           draft: true
           name: "Echidna ${{ needs.nixBuild.outputs.version }}"