fix: add missing color select to tags usage query

Signed-off-by: Robin Appelman <robin@icewind.nl>

Author: icewind1991

lib/private/Files/Cache/CacheQueryBuilder.php

@@ -28,7 +28,7 @@ public function __construct(
 
 	public function selectTagUsage(): self {
 		$this
-			->select('systemtag.name', 'systemtag.id', 'systemtag.visibility', 'systemtag.editable', 'systemtag.etag')
+			->select('systemtag.name', 'systemtag.id', 'systemtag.visibility', 'systemtag.editable', 'systemtag.etag', 'systemtag.color')
 			->selectAlias($this->createFunction('COUNT(filecache.fileid)'), 'number_files')
 			->selectAlias($this->createFunction('MAX(filecache.fileid)'), 'ref_file_id')
 			->from('filecache', 'filecache')