include justifyLastLine in hash calculation for alignment

Author: YoheiZuho

src/PhpSpreadsheet/Style/Alignment.php

@@ -514,6 +514,7 @@ public function getHashCode(): string
 
         return md5(
             $this->horizontal
+            . $this->justifyLastLine
             . $this->vertical
             . $this->textRotation
             . ($this->wrapText ? 't' : 'f')