revert refactoring of fallback call

Co-authored-by: Michal Sniatala <[email protected]>

system/Files/File.php

@@ -106,7 +106,7 @@ public function getSizeByUnit(string $unit = 'b')
         return match (strtolower($unit)) {
             'kb'    => $this->getSizeByUnitBinary(FileSizeUnit::KB),
             'mb'    => $this->getSizeByUnitBinary(FileSizeUnit::MB),
-            default => $this->getSizeByUnitBinary(FileSizeUnit::B)
+            default => $this->getSize()
         };
     }