Fix karafka framework patch

Author: Drowze

lib/datadog/tracing/contrib/karafka/patcher.rb

@@ -60,6 +60,7 @@ def target_version
 
           def patch
             require_relative 'monitor'
+            require_relative 'framework'
 
             ::Karafka::Instrumentation::Monitor.prepend(Monitor)
             ::Karafka::Messages::Messages.prepend(MessagesPatch)