doc(readme): improved readme (swaggo#10)

less error-prone more intuitive ;)

README.md

@@ -43,7 +43,7 @@ import (
 	"github.com/swaggo/gin-swagger"
 	"github.com/swaggo/gin-swagger/swaggerFiles"
 
-	_ "github.com/swaggo/gin-swagger/example/docs" // docs is generated by Swag CLI, you have to import it.
+	_ "./docs" // docs is generated by Swag CLI, you have to import it.
 )
 
 // @title Swagger Example API