fix: clear cashe on employee hierarchy change to reflect updated permissions

(cherry picked from commit 6789578b27)

erpnext/setup/doctype/employee/employee.py

@@ -78,6 +78,7 @@ class Employee(NestedSet):
 
 	def on_update(self):
 		self.update_nsm_model()
+		frappe.clear_cache()
 		if self.user_id:
 			self.update_user()
 			self.update_user_permissions()