fix: link opportunity in prospect after creating opportunity from prospect (backport #41769) (#41777)

fix: link opportunity in prospect after creating opportunity from prospect (#41769)

(cherry picked from commit 12e48f0b63)

Co-authored-by: Nabin Hait <nabinhait@gmail.com>

erpnext/crm/doctype/opportunity/opportunity.py

@@ -118,6 +118,8 @@ class Opportunity(TransactionBase, CRMNote):
 			self.title = self.customer_name
 
 		self.calculate_totals()
+
+	def on_update(self):
 		self.update_prospect()
 
 	def map_fields(self):