Change setup ruby action build-and-deploy.yml

The used ruby action is deprecated: https://github.com/actions/setup-ruby 
Hence, switching to https://github.com/ruby/setup-ruby

Author: baumeister25

.github/workflows/build-and-deploy.yml

@@ -28,7 +28,7 @@ jobs:
           java -jar target/rubygems.war &
           cd ..
       - name: SetupRuby
-        uses: actions/setup-ruby@v1
+        uses: ruby/setup-ruby@v1
         with:
           ruby-version: "2.x"