Update doc [skip ci]

src/MigrationBuilder.php

@@ -192,7 +192,7 @@ public function delete(string $table, array|string $condition = '', array $param
      *
      * The {@see QueryBuilderInterface::buildColumnDefinition()} method will be invoked to convert column definitions
      * into SQL representation. For example, it will convert `string not null` to `varchar(255) not null`
-     * and `pk` to `PRIMARY KEY AUTO_INCREMENT` (for MySQL).
+     * and `pk` to `int PRIMARY KEY AUTO_INCREMENT` (for MySQL).
      *
      * The preferred method is to use {@see ColumnBuilder} to generate column definitions as instances of
      * {@see ColumnSchemaInterface}.