docs: update events emitTo @since JSDoc tag (#9811)

* Update event.ts 

EmitTo is new to v2 and was not in v1

* replaced @since instead of removing

tooling/api/src/event.ts

@@ -193,7 +193,7 @@ async function emit(event: string, payload?: unknown): Promise<void> {
  * @param event Event name. Must include only alphanumeric characters, `-`, `/`, `:` and `_`.
  * @param payload Event payload.
  *
- * @since 1.0.0
+ * @since 2.0.0
  */
 async function emitTo(
   target: EventTarget | string,