Update comment about ignoring collectives

Signed-off-by: Arno Welzel <github@arnowelzel.de>

lib/private/Files/Utils/Scanner.php

@@ -239,7 +239,7 @@ public function scan($dir = '', $recursive = \OC\Files\Cache\Scanner::SCAN_RECUR
 				}
 			}
 
-			// don't scan received local shares, these can be scanned when scanning the owner's storage
+			// don't scan received local shares or collectives, these can be scanned when scanning the owner's storage
 			if ($storage->instanceOfStorage(SharedStorage::class) || $storage->instanceOfStorage(CollectiveStorage::class)) {
 				continue;
 			}