Update setup-steps-for-extensible-key-management-using-the-azure-key-vault.md

Added USE DBName for clarity.

Author: Rupp29

docs/relational-databases/security/encryption/setup-steps-for-extensible-key-management-using-the-azure-key-vault.md

@@ -498,6 +498,7 @@ For a note about the minimum permission levels needed for each action in this se
 1. Create a database encryption key by using the ASYMMETRIC KEY (EKMSampleASYKey).
 
     ```sql  
+    USE <DB Name>;
     --Create an ENCRYPTION KEY using the ASYMMETRIC KEY (EKMSampleASYKey)
     CREATE DATABASE ENCRYPTION KEY
     WITH ALGORITHM = AES_256