PHP 8.4 compatibility issue

Problem/Motivation

Module is not compatible with php 8.4 and throwing warning on drush cr.

Steps to reproduce

FILE: src/TranslatableConfigPagesManagerInterface.php
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FOUND 0 ERRORS AND 2 WARNINGS AFFECTING 2 LINES
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26 | WARNING | Implicitly marking a parameter as nullable is deprecated since PHP 8.4. Update the type to be explicitly nullable instead. Found implicitly nullable parameter: $language.
41 | WARNING | Implicitly marking a parameter as nullable is deprecated since PHP 8.4. Update the type to be explicitly nullable instead. Found implicitly nullable parameter: $language.
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FILE: src/TranslatableConfigPagesManager.php
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FOUND 0 ERRORS AND 2 WARNINGS AFFECTING 2 LINES
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39 | WARNING | Implicitly marking a parameter as nullable is deprecated since PHP 8.4. Update the type to be explicitly nullable instead. Found implicitly nullable parameter: $language.
67 | WARNING | Implicitly marking a parameter as nullable is deprecated since PHP 8.4. Update the type to be explicitly nullable instead. Found implicitly nullable parameter: $language.
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