Deprecated nullable type causes a warning on PHP 8.4

Describe the bug

This is a mostly self-explaining problem whose fix is, fortunately, very simple - literally one extra letter.

Deprecated: Microsoft\Graph\Core\Requests\BaseBatchRequestBuilder::__construct(): Implicitly marking parameter $errorMappings as nullable is deprecated, the explicit nullable type must be used instead in /var/www/html/vendor/microsoft/microsoft-graph-core/src/Requests/BaseBatchRequestBuilder.php on line 49

Looking at the signature of the constructor

public function __construct(RequestAdapter $requestAdapter, array $errorMappings = null)

should be

public function __construct(RequestAdapter $requestAdapter, ?array $errorMappings = null)

Maybe the whole codebase should be scanned for this deprecation... these will become errors in PHP 9.

Expected behavior

No deprecation warning.

How to reproduce

Run anything with this class under PHP 8.4

SDK Version

2.25.0

Latest version known to work for scenario above?

No response

Known Workarounds

No response

Debug output

</details>


### Configuration

_No response_

### Other information

_No response_

Start at src/Requests/BaseBatchRequestBuilder.php around line 49 and inspect the constructor signature shown in the report. Run the class under PHP 8.4 to reproduce the deprecation warning. Done means the constructor no longer emits that warning; scan other nullable parameters only if the issue's broader codebase concern is addressed.