Bump voxpupuli/ruby-version from 1 to 2

Bumps [voxpupuli/ruby-version](https://github.com/voxpupuli/ruby-version) from 1 to 2.
- [Release notes](https://github.com/voxpupuli/ruby-version/releases)
- [Commits](voxpupuli/ruby-version@v1...v2)

---
updated-dependencies:
- dependency-name: voxpupuli/ruby-version
  dependency-version: '2'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/unit_tests.yaml

@@ -31,7 +31,7 @@ jobs:
       #- name: Run RuboCop
       #  run: bundle exec rake rubocop
       - id: ruby
-        uses: voxpupuli/ruby-version@v1
+        uses: voxpupuli/ruby-version@v2
 
   linux_unit_tests:
     needs: matrix