Rename the ruby workflow

Author: mackross

.github/workflows/ruby.yml

@@ -1,6 +1,6 @@
 # This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
 # For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
-name: Ruby
+name: ruby
 
 on:
   push: