[DOCS] Use correct data type for DependencyOrdering

As the new additional file processors registration
also uses the DependencyOrderingService the value
of `before` must be an array instead of a string.

Releases: master
Resolves: #89931
Change-Id: I8eea65c56f68ae94cddb239ac9e08c18a59ee036
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62610
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Björn Jacob <bjoern.jacob@tritum.de>
Tested-by: Alexander Schnitzler <review.typo3.org@alexanderschnitzler.de>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Björn Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Alexander Schnitzler <review.typo3.org@alexanderschnitzler.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>

typo3/sysext/core/Documentation/Changelog/10.1/Feature-88602-AllowAdditionalFileProcessors.rst

@@ -18,7 +18,7 @@ To register a new processor, add the following code to :file:`ext_localconf.php`
 
    $GLOBALS['TYPO3_CONF_VARS']['SYS']['fal']['processors']['MyNewImageProcessor'] = [
        'className' => \Vendor\ExtensionName\Resource\Processing\MyNewImageProcessor::class,
-       'before' => 'LocalImageProcessor',
+       'before' => ['LocalImageProcessor']
    ];
 
 To order the processors, use `before` and `after` statements. TYPO3 will process the file