[CI] Fix byebug dependency for JRuby, change title

Author: picandocodigo

.buildkite/pipeline.yml

@@ -1,5 +1,5 @@
 steps:
-  - label: ":ruby: v{{ matrix.ruby }} :phone: Transport: {{ matrix.transport }} :elasticsearch: Suite: {{ matrix.suite }}"
+  - label: ":ruby: {{ matrix.ruby_source}}:{{ matrix.ruby }} :phone: Transport: {{ matrix.transport }} :elasticsearch: Suite: {{ matrix.suite }}"
     agents:
       provider: "gcp"
     env:

Gemfile

@@ -37,6 +37,6 @@ unless defined?(JRUBY_VERSION) || defined?(Rubinius)
 end
 
 group :development, :test do
-  gem 'byebug'
+  gem 'byebug' unless defined?(JRUBY_VERSION)
   gem 'rspec'
 end