docs:cdiwadkar16-patch-4-69 - changed link

from FQDN blog in Chinese to English FAQ on troubleshooting unable to establish connection/fqdn error.

docs-en/14-reference/03-connector/node.mdx

@@ -225,7 +225,7 @@ See [video tutorial](https://www.taosdata.com/blog/2020/11/11/1957.html) for the
 
 2. "Unable to establish connection", "Unable to resolve FQDN"
 
-  Usually, root cause is the FQDN is not configured correctly. You can refer to [How to understand TDengine's FQDN (In Chinese)](https://www.taosdata.com/blog/2021/07/29/2741.html).
+  Usually, the root cause is an incorrect FQDN configuration. You can refer to this section in the [FAQ](https://docs.tdengine.com/2.4/train-faq/faq/#2-how-to-handle-unable-to-establish-connection) to troubleshoot.
 
 ## Important Updates