Use ruby/setup-ruby v1 (#3012)

* Bump ruby/setup-ruby from 1.117.0 to 1.118.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.117.0 to 1.118.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Commits](https://github.com/ruby/setup-ruby/compare/3068fa83f9cbd7ae106cac45483635a2f3a195c9...eae47962baca661befdfd24e4d6c34ade04858f7)

---
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>

* Apply suggestions from code review

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Junegunn Choi <junegunn.c@gmail.com>

.github/workflows/linux.yml

@@ -25,7 +25,7 @@ jobs:
         go-version: 1.19
 
     - name: Setup Ruby
-      uses: ruby/setup-ruby@3068fa83f9cbd7ae106cac45483635a2f3a195c9
+      uses: ruby/setup-ruby@v1
       with:
         ruby-version: 3.0.0
 

.github/workflows/macos.yml

@@ -25,7 +25,7 @@ jobs:
         go-version: 1.18
 
     - name: Setup Ruby
-      uses: ruby/setup-ruby@3068fa83f9cbd7ae106cac45483635a2f3a195c9
+      uses: ruby/setup-ruby@v1
       with:
         ruby-version: 3.0.0