test: Tested TOC display

Signed-off-by: Wendy Ha <[email protected]>

Author: wendy-ha18

content/en/docs/v3.4/how-to-migrate.md

@@ -42,7 +42,7 @@ The following steps show how to migrate your etcd data stored from v2store to v3
 
 ### Migration Process
 
-#### Step 1: Write a test key into the v2store and confirm that key exists
+### Step 1: Write a test key into the v2store and confirm that key exists
 
 ```sh
 export ETCDCTL_API=2