fix import statement for db module in documentation

Author: HugoRCD

docs/content/docs/2.features/0.database.md

@@ -193,7 +193,7 @@ Now that you have your database schema and migrations set up, you can start quer
 The `hub:db` module provides access to the database through a [Drizzle ORM](https://orm.drizzle.team) instance.
 
 ```ts
-import { kv } from 'hub:kv'
+import { db } from 'hub:db'
 ```
 
 ::tip