chore: apply suggestion from code review

Co-authored-by: hackerman <[email protected]>

Author: vinckr

docs/self-hosted/oel/oel-high-performance-pooling.mdx

@@ -4,7 +4,7 @@ title: High-performance database connection pooling
 sidebar_label: High-performance pooling
 ---
 
-High-performance pooling is available only in the Ory Enterprise License (OEL). It uses
+High-performance pooling is available only with an Ory Enterprise License (OEL). It uses
 [pgxpool](https://pkg.go.dev/github.com/jackc/pgx/v5/pgxpool) and provides additional configuration options for managing database
 connections under variable load.