Bump ruby/setup-ruby from 1.172.0 to 1.173.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.172.0 to 1.173.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Commits](ruby/setup-ruby@v1.172.0...v1.173.0)

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

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

Author: dependabot[bot]

.github/workflows/appcast.yml

@@ -23,7 +23,7 @@ jobs:
           ${{ runner.os }}-gems-
           
     - name: Setup Ruby, JRuby and TruffleRuby
-      uses: ruby/setup-ruby@v1.172.0
+      uses: ruby/setup-ruby@v1.173.0
       with:
         ruby-version: '3.0'