TiDB Serverless Tier -> TiDB Serverless

develop/dev-guide-proxysql-integration.md

@@ -119,11 +119,11 @@ systemctl start docker
 
 ### Option 1: Integrate TiDB Cloud with ProxySQL
 
-For this integration, you will be using the [ProxySQL Docker image](https://hub.docker.com/r/proxysql/proxysql) along with a TiDB Serverless Tier cluster. The following steps will set up ProxySQL on port `16033`, so make sure this port is available.
+For this integration, you will be using the [ProxySQL Docker image](https://hub.docker.com/r/proxysql/proxysql) along with a TiDB Serverless cluster. The following steps will set up ProxySQL on port `16033`, so make sure this port is available.
 
 #### Step 1. Create a TiDB Serverless cluster
 
-1. [Create a free TiDB Serverless Tier cluster](https://docs.pingcap.com/tidbcloud/tidb-cloud-quickstart#step-1-create-a-tidb-cluster). Remember the root password that you set for your cluster.
+1. [Create a free TiDB Serverless cluster](https://docs.pingcap.com/tidbcloud/tidb-cloud-quickstart#step-1-create-a-tidb-cluster). Remember the root password that you set for your cluster.
 2. Get your cluster hostname, port, and username for later use.
 
     1. On the [Clusters](https://tidbcloud.com/console/clusters) page, click your cluster name to go to the cluster overview page.
@@ -327,12 +327,12 @@ For this integration, you will be using the [ProxySQL Docker image](https://hub.
     >
     > 1. Adds a user using the username and password of your cluster.
     > 2. Assigns the user to the monitoring account.
-    > 3. Adds your TiDB Serverless Tier cluster to the list of hosts.
-    > 4. Enables a secure connection between ProxySQL and the TiDB Serverless Tier cluster.
+    > 3. Adds your TiDB Serverless cluster to the list of hosts.
+    > 4. Enables a secure connection between ProxySQL and the TiDB Serverless cluster.
     >
     > To have a better understanding, it is strongly recommended that you check the `proxysql-prepare.sql` file. To learn more about ProxySQL configuration, see [ProxySQL documentation](https://proxysql.com/documentation/proxysql-configuration/).
 
-    The following is an example output. You will see that the hostname of your cluster is shown in the output, which means that the connectivity between ProxySQL and the TiDB Serverless Tier cluster is established.
+    The following is an example output. You will see that the hostname of your cluster is shown in the output, which means that the connectivity between ProxySQL and the TiDB Serverless cluster is established.
 
     ```
     *************************** 1. row ***************************
@@ -388,7 +388,7 @@ For this integration, you will be using the [ProxySQL Docker image](https://hub.
     SELECT VERSION();
     ```
 
-    If the TiDB version is displayed, you are successfully connected to your TiDB Serverless Tier cluster through ProxySQL. To exit from the MySQL client anytime, enter `quit` and press <kbd>enter</kbd>.
+    If the TiDB version is displayed, you are successfully connected to your TiDB Serverless cluster through ProxySQL. To exit from the MySQL client anytime, enter `quit` and press <kbd>enter</kbd>.
 
     > **Note:**
     >