Update README

Author: dveeden

README.md

@@ -460,12 +460,18 @@ func main() {
 A custom driver name can be set via build options: `-ldflags '-X "github.com/go-mysql-org/go-mysql/driver.driverName=gomysql"'`.
 
 This can be useful when using [GORM](https://gorm.io/docs/connecting_to_the_database.html#Customize-Driver):
+
 ```go
-mysql.Config{
-    DriverName: "gomysql",
-    ...
-}
+import (
+  _ "github.com/go-mysql-org/go-mysql/driver"
+  "gorm.io/driver/mysql"
+  "gorm.io/gorm"
+)
 
+db, err := gorm.Open(mysql.New(mysql.Config{
+  DriverName: "gomysql",
+  DSN: "gorm:[email protected]:3306/test",
+}))
 ```
 
 ### Custom NamedValueChecker