[docs] Update Installation & Deployment > Deploying with Docker

Harmonize catalog name and commands to be consistent with other deployment options and catalog name in Getting Started with Flink guide

Issue alibaba#243

website/docs/install-deploy/deploying-with-docker.md

@@ -214,17 +214,12 @@ docker exec -it jobmanager ./sql-client
 2. Use the commands below to verify that the cluster works.
 
 ```sql title="Flink SQL"
-CREATE CATALOG my_fluss WITH (
+CREATE CATALOG fluss_catalog WITH (
     'type' = 'fluss',
     'bootstrap.servers' = 'coordinator-server:9123'
 );
 ```
 
-```sql title="Flink SQL"
-USE CATALOG my_fluss;
-```
-
-
 Congratulations! You have successfully deployed Fluss with `docker run`. 
 Check out [this section](#whats-next) for potential next steps.
 
@@ -539,16 +534,12 @@ docker compose exec jobmanager ./sql-client
 2. Use the commands below to verify that the cluster works.
 
 ```sql title="Flink SQL"
-CREATE CATALOG my_fluss WITH (
+CREATE CATALOG fluss_catalog WITH (
     'type' = 'fluss',
     'bootstrap.servers' = 'coordinator-server:9123'
 );
 ```
 
-```sql title="Flink SQL"
-USE CATALOG my_fluss;
-```
-
 Congratulations! You have successfully deployed Fluss with `docker compose`.
 Check out [this section](#whats-next) for potential next steps.