Set specific setup-ruby version

Author: gibbs

.github/workflows/ci.yml

@@ -68,7 +68,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@086ffb1a2090c870a3f881cc91ea83aa4243d408
         with:
           ruby-version: '3.2'
           bundler-cache: true