Update helpful comment in migration template

Author: ShkrutDenis

template/migrations/list/1_create_example_table.go

@@ -16,12 +16,16 @@ func (m *CreateExampleTable) Up(con *sqlx.DB) {
 	// Write your migration logic here
 	// Example:
 	// 	con.MustExec("CREATE TABLE example ( id int auto_increment, constraint migrations_pk primary key (id));")
-	// Or you can use existed query builder
+	// Or you can use existed query builder:
+	//  import "github.com/ShkrutDenis/go-migrations/builder"
+	//  builder.NewTable("example", con)
 }
 
 func (m *CreateExampleTable) Down(con *sqlx.DB) {
 	// Write your migration rollback logic here
 	// Example:
 	// 	con.MustExec("DROP TABLE example;")
-	// Or you can use existed query builder
+	// Or you can use existed query builder:
+	//  import "github.com/ShkrutDenis/go-migrations/builder"
+	//  builder.NewTable("example", con)
 }