Bump ruby/setup-ruby from 1.306.0 to 1.308.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.306.0 to 1.308.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@c4e5b13...97ecb7b)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.308.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/publish.yml

@@ -68,7 +68,7 @@ jobs:
         if: ${{ github.actor != 'dependabot[bot]' && github.event.pull_request.head.repo.fork == false }}
 
       - name: Resolve build_ruby version
-        uses: ruby/setup-ruby@c4e5b1316158f92e3d49443a9d58b31d25ac0f8f # v1.306.0
+        uses: ruby/setup-ruby@97ecb7b512899eb71ab1bf2310a624c6f1589ac6 # v1.308.0
         with:
           ruby-version: '${{ matrix.entry.build_ruby }}'
           bundler: none