Fix missing comma (#7495)

Fixed missing comma after method set_contact_link
diff --git a/erpnext/crm/doctype/opportunity/opportunity.js b/erpnext/crm/doctype/opportunity/opportunity.js
index 1ebc0a9..d7d412a 100644
--- a/erpnext/crm/doctype/opportunity/opportunity.js
+++ b/erpnext/crm/doctype/opportunity/opportunity.js
@@ -56,7 +56,7 @@
 		} else if(frm.doc.lead) {
 			frappe.contact_link = {doc: frm.doc, fieldname: 'lead', doctype: 'Lead'}
 		}
-	}
+	},
 
 	make_supplier_quotation: function(frm) {
 		frappe.model.open_mapped_doc({