update node constants, follow up to #3592 (#3593)

update node constants, this was forgotten in #3592
not a big deal as these are generated on building node,
so this is just a simple commit of these files after running `npm run build`

node/lib/constants.ts

@@ -56,6 +56,7 @@ export enum C {
   DC_EVENT_SMTP_CONNECTED = 101,
   DC_EVENT_SMTP_MESSAGE_SENT = 103,
   DC_EVENT_WARNING = 300,
+  DC_EVENT_WEBXDC_INSTANCE_DELETED = 2121,
   DC_EVENT_WEBXDC_STATUS_UPDATE = 2120,
   DC_GCL_ADD_ALLDONE_HINT = 4,
   DC_GCL_ADD_SELF = 2,
@@ -297,4 +298,5 @@ export const EventId2EventName: { [key: number]: string } = {
   2100: 'DC_EVENT_CONNECTIVITY_CHANGED',
   2110: 'DC_EVENT_SELFAVATAR_CHANGED',
   2120: 'DC_EVENT_WEBXDC_STATUS_UPDATE',
+  2121: 'DC_EVENT_WEBXDC_INSTANCE_DELETED',
 }