Merge pull request #13057 from taosdata/docs/cdiwadkar16-patch-4-10

docs:cdiwadkar16-patch-4-10 - grammar change

docs-en/07-develop/03-insert-data/04-opentsdb-json.mdx

@@ -47,7 +47,7 @@ Please refer to [OpenTSDB HTTP API](http://opentsdb.net/docs/build/html/api_http
 
 :::note
 - In JSON protocol, strings will be converted to nchar type and numeric values will be converted to double type.
-- Only data in array format is accepted, array must be used even there is only one row.
+- Only data in array format is accepted and so an array must be used even if there is only one row.
 
 :::