chore: docs for stock settings

[skip ci]

erpnext/stock/doctype/stock_settings/stock_settings.json

@@ -101,6 +101,7 @@
    "fieldtype": "Column Break"
   },
   {
+   "documentation_url": "https://docs.erpnext.com/docs/v14/user/manual/en/stock/articles/calculation-of-valuation-rate-in-fifo-and-moving-average",
    "fieldname": "valuation_method",
    "fieldtype": "Select",
    "label": "Default Valuation Method",
@@ -382,7 +383,7 @@
  "index_web_pages_for_search": 1,
  "issingle": 1,
  "links": [],
- "modified": "2023-05-29 12:19:18.884592",
+ "modified": "2023-05-29 15:09:54.959411",
  "modified_by": "Administrator",
  "module": "Stock",
  "name": "Stock Settings",
@@ -403,4 +404,4 @@
  "sort_order": "ASC",
  "states": [],
  "track_changes": 1
-}
+}