Bump softprops/action-gh-release from 2.0.5 to 2.0.6 (#229)

Bumps [softprops/action-gh-release](https://github.com/softprops/action-gh-release) from 2.0.5 to 2.0.6.
- [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@69320db...a74c6b7)

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

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

.github/workflows/ci-ruby.yml

@@ -89,7 +89,7 @@ jobs:
             ]
       # Only tagged and push to GitHub, you should publish to rubygems.org with OTP
       - name: Release
-        uses: softprops/action-gh-release@69320dbe05506a9a39fc8ae11030b214ec2d1f87 # v2.0.5
+        uses: softprops/action-gh-release@a74c6b72af54cfa997e81df42d94703d6313a2d0 # v2.0.6
         if: startsWith(github.ref, 'refs/tags/')
         with:
           files: pkg/irb-power_assert.gem