docs: fix return type in BaseResult

[Pebryan354]

Description
when I use the getRow function in the query builder
$this->db->table("table_name")->getWhere(["id" => $id])->getRow("name"), it works fine, but there is a notif or warning "Expected type 'string'...."

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[kenjis]

Please fix coding style.
See https://github.com/codeigniter4/CodeIgniter4/actions/runs/8548870578/job/23436880333?pr=8709
and https://github.com/codeigniter4/CodeIgniter4/blob/develop/contributing/pull_request.md#php-style

[kenjis]

Please update ResultInterface, too.

--- a/system/Database/ResultInterface.php
+++ b/system/Database/ResultInterface.php
@@ -63,8 +63,8 @@ interface ResultInterface
      * @param         string                           $type The type of result object. 'array', 'object' or class name.
      * @phpstan-param class-string<T>|'array'|'object' $type
      *
-     * @return         array|object|stdClass|null
-     * @phpstan-return ($type is 'object' ? stdClass|null : ($type is 'array' ? array|null : T|null))
+     * @return         array|float|int|object|stdClass|string|null
+     * @phpstan-return ($n is string ? float|int|string|null : ($type is 'object' ? stdClass|null : ($type is 'array' ? array|null : T|null)))
      */
     public function getRow($n = 0, string $type = 'object');
 

[kenjis]

@Pebryan354 Thank you!