Bump softprops/action-gh-release from 2.0.3 to 2.0.4 (#510)

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](3198ee18f8...9d7c94cfd0)

---
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/github-release.yml

@@ -24,7 +24,7 @@ jobs:
           mkdir -p dist
           cp -r build synapse-admin-$version
           tar chvzf dist/synapse-admin-$version.tar.gz synapse-admin-$version
-      - uses: softprops/action-gh-release@3198ee18f814cdf787321b4a32a26ddbf37acc52
+      - uses: softprops/action-gh-release@9d7c94cfd0a1f3ed45544c887983e9fa900f0564
         with:
           files: dist/*.tar.gz
         env: