ci: use ruby/setup-ruby

Author: kou

.github/workflows/test.yml

@@ -19,7 +19,7 @@ jobs:
           # - windows-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby-version }}
       - name: Prepare the Apache Arrow APT repository