Added description to update booking method

(cherry picked from commit a947eb1)

apps/booking/views.py

@@ -143,6 +143,10 @@ class UpdatePendingBooking(generics.UpdateAPIView):
     permission_classes = (permissions.AllowAny,)
     serializer_class = UpdateBookingSerializer
 
+    @swagger_auto_schema(operation_description="Request body params\n\n"
+                                               "Required: 'email', 'phone', 'last_name', "
+                                               "'first_name', 'country_code', 'pending_booking_id',"
+                                               "Not req: 'note'")
     def patch(self, request, *args, **kwargs):
         instance = self.get_object()
         data = request.data.copy()