docs: fix sql_driver config grammar

Author: YvanDaSilva

docs/reference/config.md

@@ -136,7 +136,7 @@ The `gen` mapping supports the following keys:
 - `sql_package`:
   - Either `pgx/v4`, `pgx/v5` or `database/sql`. Defaults to `database/sql`.
 - `sql_driver`:
-  - Either `github.com/jackc/pgx/v4`, `github.com/jackc/pgx/v5`, `github.com/lib/pq` or `github.com/go-sql-driver/mysql`. No defaults, required if  query annotation `:copyfrom` is used.
+  - Either `github.com/jackc/pgx/v4`, `github.com/jackc/pgx/v5`, `github.com/lib/pq` or `github.com/go-sql-driver/mysql`. No defaults. Required if query annotation `:copyfrom` is used.
 - `emit_db_tags`:
   - If true, add DB tags to generated structs. Defaults to `false`.
 - `emit_prepared_queries`: