Update lib/fluent/plugin/output.rb

Co-authored-by: Shizuo Fujita <watson1978@gmail.com>

Author: kenhys

lib/fluent/plugin/output.rb

@@ -376,7 +376,7 @@ def configure(conf)
             if Fluent.windows? && @buffer.persistent?
               service_timeout = read_wait_to_kill_service_timeout
               if service_timeout && service_timeout <= 5000 # default value might varies on windows client/server
-                log.warn "your WaitToKillServiceTimeout=#{service_timeout} registry configuration seems too short. Recommend to extend that value not to corrupt flushing buffer with forcibly shutdown"
+                log.warn "your WaitToKillServiceTimeout=#{service_timeout} registry configuration seems too short. Recommend to extend the value of 'HKLM\\SYSTEM\\CurrentControlSet\\Control\\WaitToKillServiceTimeout' to prevent buffer corruption from a forced shutdown"
               end
             end
           end