Update tidb-cloud/tidb-cloud-tls-connect-to-premium.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: ljun0712

tidb-cloud/tidb-cloud-tls-connect-to-premium.md

@@ -76,7 +76,7 @@ Parameter descriptions:
 
 [MySQL Connector/J](https://dev.mysql.com/doc/connector-j/en/)'s TLS connection configurations are used here as an example.
 
-After downloading TiDB cluster CA, if you want to import it into your operating system, you can use the `keytool -importcert -alias TiDBCACert -file ca.pem -keystore <your_custom_truststore_path> -storepass <your_truststore_password>` command.
+After downloading the TiDB cluster CA certificate, if you want to import it into your operating system, you can use the `keytool -importcert -alias TiDBCACert -file ca.pem -keystore <your_custom_truststore_path> -storepass <your_truststore_password>` command.
 
 ```shell
 /* Be sure to replace the parameters in the following connection string. */