fix: ensure cache is cleared on fiscal year update and trash

(cherry picked from commit 39b0e35)

Author: ljain112

erpnext/accounts/doctype/fiscal_year/fiscal_year.py

@@ -33,6 +33,12 @@ def validate(self):
 		self.validate_dates()
 		self.validate_overlap()
 
+	def on_update(self):
+		frappe.cache().delete_key("fiscal_years")
+
+	def on_trash(self):
+		frappe.cache().delete_key("fiscal_years")
+
 	def validate_dates(self):
 		self.validate_from_to_dates("year_start_date", "year_end_date")
 		if self.is_short_year: