fix ruby action

Author: DannyBen

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
       uses: actions/checkout@v2
 
     - name: Setup Ruby
-      uses: actions/setup-ruby@v1
+      uses: ruby/setup-ruby@v1
       with: 
         ruby-version: '${{ matrix.ruby }}'
         bundler-cache: true