docs: let {HOST} take the full hostname in the Knex quickstart

The template appended .sqlite.cloud to {HOST} while the prose said to
substitute the server hostname, which already ends in .sqlite.cloud.

Author: damlayildiz

sqlite-cloud/quickstart/quick-start-knex.mdx

@@ -66,7 +66,7 @@ npm install @types/node nodemon ts-node typescript --save-dev
 - Create a `.env` file in the root of your project and add your SQLite Cloud connection string:
 
 ```bash
-DATABASE_URL="sqlitecloud://{USER}:{PASSWORD}@{HOST}.sqlite.cloud:8860"
+DATABASE_URL="sqlitecloud://{USER}:{PASSWORD}@{HOST}:8860"
 ```
 
 Replace `{USER}`, `{PASSWORD}`, and `{HOST}` with your actual SQLite Cloud credentials and server hostname.