Update deprecated github Ruby action 💎

Author: artkirienko

.github/workflows/ruby.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
     - uses: actions/checkout@v1
     - name: Set up Ruby 2.7.x
-      uses: actions/setup-ruby@v1
+      uses: ruby/setup-ruby@v1
       with:
         ruby-version: 2.7
     - name: Build and test with Rake, RSpec, RuboCop, Fasterer