[processing] Fix crash on closing batch processing dialog

Refs #20650

Author: nyalldawson

python/plugins/processing/gui/AlgorithmDialog.py

@@ -97,7 +97,7 @@ def getParametersPanel(self, alg, parent):
 
     def runAsBatch(self):
         self.close()
-        dlg = BatchAlgorithmDialog(self.algorithm(), parent=iface.mainWindow())
+        dlg = BatchAlgorithmDialog(self.algorithm().create(), parent=iface.mainWindow())
         dlg.show()
         dlg.exec_()