[CLEANUP] The correct case must be used for standard PHP types in phpdoc

This patch applies the phpdoc_types rule of the
php-cs-fixer. See http://cs.sensiolabs.org/ -> phpdoc_types

Releases: master, 8.7
Resolves: #83106
Change-Id: I958b75d85a08169a987afe9eed0baa4d86139770
Reviewed-on: https://review.typo3.org/54770


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>