Bump ruby/setup-ruby from 1.188.0 to 1.190.0 (#74)

Author: dependabot[bot]

.github/workflows/rubocop.yml

@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@50ba3386b050ad5b97a41fcb81240cbee1d1821f
+        uses: ruby/setup-ruby@a6e6f86333f0a2523ece813039b8b4be04560854
         with:
           ruby-version: .ruby-version
           bundler-cache: true

.github/workflows/tests.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
 
       - name: Setup Ruby
-        uses: ruby/setup-ruby@50ba3386b050ad5b97a41fcb81240cbee1d1821f
+        uses: ruby/setup-ruby@a6e6f86333f0a2523ece813039b8b4be04560854
         with:
           ruby-version: .ruby-version
           bundler-cache: true