[KYUUBI #3726] [DOCS] Place comments above line to avoid mislead users

### _Why are the changes needed?_

When users copy the config directly, the suffix comments will cause run failure.

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [ ] [Run test](https://kyuubi.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #3726 from hddong/improve-trino-quick-start.

Closes #3726

1b330d5 [hongdongdong] [DOCS] Place comments above line to avoid mislead users

Authored-by: hongdongdong <hongdd@apache.org>
Signed-off-by: hongdongdong <hongdd@apache.org>

Author: hongdongdong

docs/quick_start/quick_start.md

@@ -176,8 +176,10 @@ To enable the Trino engine, the `kyuubi.engine.type` need to be set as `TRINO`.
 
 ```bash
 kyuubi.engine.type TRINO
-kyuubi.session.engine.trino.connection.url http://localhost:8080    # Your trino cluster server url
-kyuubi.session.engine.trino.connection.catalog hive   # The default catalog connect to.
+# Your trino cluster server url
+kyuubi.session.engine.trino.connection.url http://localhost:8080
+# The default catalog connect to
+kyuubi.session.engine.trino.connection.catalog hive
 ```
 
 ### Starting Kyuubi