Fixed typo
diff --git a/erpnext/patches/v12_0/set_valid_till_date_in_supplier_quotation.py b/erpnext/patches/v12_0/set_valid_till_date_in_supplier_quotation.py
index befa46c..4a6e228 100644
--- a/erpnext/patches/v12_0/set_valid_till_date_in_supplier_quotation.py
+++ b/erpnext/patches/v12_0/set_valid_till_date_in_supplier_quotation.py
@@ -2,7 +2,7 @@
 import frappe
 
 def execute():
-	frappe.reload_doc("buying", "doctype", "suppplier_quotation")
+	frappe.reload_doc("buying", "doctype", "supplier_quotation")
 	frappe.db.sql("""UPDATE `tabSupplier Quotation`
 		SET valid_till = DATE_ADD(transaction_date , INTERVAL 1 MONTH)
-		WHERE docstatus < 2""")
\ No newline at end of file
+		WHERE docstatus < 2""")