[BUGFIX] Fix wrong return hint for getRecordOverlay

This commit changes the return hint of
TYPO3\CMS\Core\Domain\Repository\PageRepository::getRecordOverlay to
mention that the function returns NULL instead of FALSE, if
$OLmode is "hideNonTranslated" and no translation is found

Resolves: #92052
Releases: master, 10.4
Change-Id: I5ee9504d234b230f80a6108ad53698770cc56f60
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65392
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>

typo3/sysext/core/Classes/Domain/Repository/PageRepository.php

@@ -579,9 +579,9 @@ protected function getPageOverlaysForLanguageUids(array $pageUids, array $langua
      * @param string $table Table name
      * @param array $row Record to overlay. Must contain uid, pid and $table]['ctrl']['languageField']
      * @param int $sys_language_content Pointer to the sys_language uid for content on the site.
-     * @param string $OLmode Overlay mode. If "hideNonTranslated" then records without translation will not be returned  un-translated but unset (and return value is FALSE)
+     * @param string $OLmode Overlay mode. If "hideNonTranslated" then records without translation will not be returned  un-translated but unset (and return value is NULL)
      * @throws \UnexpectedValueException
-     * @return mixed Returns the input record, possibly overlaid with a translation.  But if $OLmode is "hideNonTranslated" then it will return FALSE if no translation is found.
+     * @return mixed Returns the input record, possibly overlaid with a translation.  But if $OLmode is "hideNonTranslated" then it will return NULL if no translation is found.
      */
     public function getRecordOverlay($table, $row, $sys_language_content, $OLmode = '')
     {