[docs] Fix the formatting error in the Configuration page (#1169)

Author: ZmmBigdata

website/docs/maintenance/configuration.md

@@ -67,10 +67,9 @@ during the Fluss cluster working.
 
 ## CoordinatorServer
 
-| Option                   | Type    | Default | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
-|--------------------------|---------|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| |
-| coordinator.io-pool.size | Integer | 10      | The size of the IO thread pool to run blocking operations for coordinator server. This includes discard unnecessary snapshot files. Increase this value if you experience slow unnecessary snapshot files clean. The default value is 10.                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
-
+| Option                   | Type    | Default | Description                                                                                                                                                                                                                                |
+| ------------------------ | ------- | ------- |--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| coordinator.io-pool.size | Integer | 10      | The size of the IO thread pool to run blocking operations for coordinator server. This includes discard unnecessary snapshot files. Increase this value if you experience slow unnecessary snapshot files clean. The default value is 10.  |
 ## TabletServer
 
 | Option                                     | Type       | Default         | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |