updated login message when get error EOFError (EOFError)

Signed-off-by: OlehPalanskyi <Trahterber@gmail.com>

Author: OlehPalanskyi

lib/fluent/plugin/in_opensearch.rb

@@ -344,7 +344,7 @@ def update_retry_state(error=nil)
         end
         @retry.step
         if error.message.include?('EOFError (EOFError)')
-          log.error("Restart plugin #{error.message}")
+          log.error("Restart plugin because hit error #{error.message}")
           exit(1)
         end
         #Raise error if the retry limit has been reached