fix: remove unnecessary whitespace (#20697) (#20703)

Author: ti-chi-bot

placement-rules-in-sql.md

@@ -231,7 +231,7 @@ You can configure `CONSTRAINTS`, `FOLLOWER_CONSTRAINTS`, and `LEARNER_CONSTRAINT
 
 | CONSTRAINTS format | Description |
 |----------------------------|-----------------------------------------------------------------------------------------------------------|
-| List format  | If a constraint to be specified applies to all replicas, you can use a key-value list format. Each key starts with `+` or `-`. For example: <br/><ul><li>`[+region=us-east-1]` means placing data on nodes  that have a `region` label as `us-east-1`.</li><li>`[+region=us-east-1,-type=fault]` means placing data on nodes that have a `region` label as `us-east-1` but do not have a `type` label as `fault`.</li></ul><br/>  |
+| List format  | If a constraint to be specified applies to all replicas, you can use a key-value list format. Each key starts with `+` or `-`. For example: <br/><ul><li>`[+region=us-east-1]` means placing data on nodes that have a `region` label as `us-east-1`.</li><li>`[+region=us-east-1,-type=fault]` means placing data on nodes that have a `region` label as `us-east-1` but do not have a `type` label as `fault`.</li></ul><br/>  |
 | Dictionary format | If you need to specify different numbers of replicas for different constraints, you can use the dictionary format. For example: <br/><ul><li>`FOLLOWER_CONSTRAINTS="{+region=us-east-1: 1,+region=us-east-2: 1,+region=us-west-1: 1}";` means placing one Follower in `us-east-1`, one Follower in `us-east-2`, and one Follower in `us-west-1`.</li><li>`FOLLOWER_CONSTRAINTS='{"+region=us-east-1,+type=scale-node": 1,"+region=us-west-1": 1}';` means placing one Follower on a node that is located in the `us-east-1` region and has the `type` label as `scale-node`, and one Follower in `us-west-1`.</li></ul>The dictionary format supports each key starting with `+` or `-` and allows you to configure the special `#evict-leader` attribute. For example, `FOLLOWER_CONSTRAINTS='{"+region=us-east-1":1, "+region=us-east-2": 2, "+region=us-west-1,#evict-leader": 1}'` means that the Leaders elected in `us-west-1` will be evicted as much as possible during disaster recovery.|
 
 > **Note:**