Update docs.md (#8217)

documentation20/en/02.getting-started/docs.md

@@ -180,7 +180,9 @@ taos> select avg(f1), max(f2), min(f3) from test.meters where areaid=10;
 taos> select avg(f1), max(f2), min(f3) from test.t10 interval(10s);
 ```
 
-**Note**: you can run command `taosdemo` with many options, like number of tables, rows of records and so on. To know more about these options, you can execute `taosdemo --help` and then take a try using different options.
+## <a class="anchor" id="taosdemo"></a> Using taosdemo in detail
+
+you can run command `taosdemo` with many options, like number of tables, rows of records and so on. To know more about these options, you can execute `taosdemo --help` and then take a try using different options.
 Please refer to [How to use taosdemo to test the performance of TDengine](https://www.taosdata.com/en/documentation/getting-started/taosdemo) for detail.
 
 ## Client and Alarm Module