Update docs/guides/nodejs/nitric-and-pgsql.mdx

Co-authored-by: Ryan Cartwright <[email protected]>

Author: davemooreuws

docs/guides/nodejs/nitric-and-pgsql.mdx

@@ -41,7 +41,7 @@ npm install pg
 
 ## Create a Nitric SQL Database and Connect to it
 
-Use Nitric’s `sql` feature to create a new SQL database, then use connection string and the `pg` library to connect to it.
+Use Nitric’s `sql` feature to create a new SQL database, then use `.connectionString()` and the `pg` library to connect to it.
 
 ```ts title: resources/db.ts
 import { sql } from '@nitric/sdk'