Fix URL

Author: SchrodingersGat

inventree/sales_order.py

@@ -249,7 +249,7 @@ def allocateItems(self, items=[]):
         """
 
         # Customize URL
-        url = f'order/so/{self.getOrder().pk}/allocate'
+        url = f'order/so/{self.getOrder().pk}/allocate/'
 
         # Create data from given inputs
         data = {