refactor: parse native JSON request args in manufacturing/doctype/bom/bom.py

Use frappe.parse_json instead of json.loads so the whitelisted endpoints
accept native JSON types (list/dict/bool) in addition to JSON strings.

erpnext/manufacturing/doctype/bom/bom.py

@@ -585,7 +585,7 @@ class BOM(WebsiteGenerator):
 		if isinstance(kwargs, str):
 			import json
 
-			kwargs = json.loads(kwargs)
+			kwargs = frappe.parse_json(kwargs)
 
 		return kwargs