doc(readme): add Due Diligence link in readme

doc(readme): add Due Diligence link in the readme file

Author: ShannonDing

README.md

@@ -16,6 +16,7 @@
 ## [Due Diligence](https://github.com/apache/rocketmq-client-go/issues/423)
 [Here](https://github.com/apache/rocketmq-client-go/issues/423), we sincerely invite you to take a minute to feedback on your usage scenario. 
 [Click Here](https://github.com/apache/rocketmq-client-go/issues/423) or go to [ISSUE #423](https://github.com/apache/rocketmq-client-go/issues/423) if you accept.
+
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 ## Features
 At present, this SDK supports