Update post-installation-check.md

Co-authored-by: Ran <huangran@pingcap.com>

post-installation-check.md

@@ -56,7 +56,7 @@ Log in to the database by running the following command:
 mysql -u root -h ${tidb_server_host_IP_address} -P 4000
 ```
 
-`${tidb_server_host_IP_address}` is one of the IP addresses set up for `tidb_servers` when you [initialize cluster tepology files](/production-deployment-using-tiup.md #Step 3 Initialize cluster tepology files), such as `10.0.1.7`.
+`${tidb_server_host_IP_address}` is one of the IP addresses set for `tidb_servers` when you [initialize the cluster topology file](/production-deployment-using-tiup.md#step-3-initialize-cluster-topology-file), such as `10.0.1.7`.
 
 The following information indicates successful login: