build: use ruby/setup-ruby version 1.215.0

Author: Alystrasz

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-gems-
       - name: Setup Ruby
-        uses: ruby/setup-ruby@8575951200e472d5f2d95c625da0c7bec8217c42 # v1.161.0
+        uses: ruby/setup-ruby@v1.215.0
         with:
           ruby-version: '3.1' # Not needed with a .ruby-version file
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically