[fix] Missing value Net Weight Added in Calculate Based On select field (#11883)

diff --git a/erpnext/accounts/doctype/shipping_rule/shipping_rule.json b/erpnext/accounts/doctype/shipping_rule/shipping_rule.json
index 13b3265..1d65d86 100644
--- a/erpnext/accounts/doctype/shipping_rule/shipping_rule.json
+++ b/erpnext/accounts/doctype/shipping_rule/shipping_rule.json
@@ -329,7 +329,7 @@
    "label": "Calculate Based On", 
    "length": 0, 
    "no_copy": 0, 
-   "options": "Fixed\nNet Total", 
+   "options": "Fixed\nNet Total\nNet Weight", 
    "permlevel": 0, 
    "print_hide": 0, 
    "print_hide_if_no_value": 0, 
@@ -536,7 +536,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2017-11-17 13:10:34.302259", 
+ "modified": "2017-12-08 11:26:41.909395", 
  "modified_by": "Administrator", 
  "module": "Accounts", 
  "name": "Shipping Rule",