Fix Firehose typo in Jetstream guide

Author: futurGH

src/content/guides/jetstream/introduction/getting-started.mdx

@@ -16,7 +16,7 @@ import { Jetstream } from "@skyware/jetstream";
 const jetstream = new Jetstream();
 ```
 
-The `Firehose` class takes an object parameter with the following properties:
+The `Jetstream` class takes an object parameter with the following properties:
 
 - `wantedCollections`: An array of collections to subscribe to events for. If not provided or empty, you will receive events for all collections.
 - `wantedDids`: An array of DIDs to subscribe to events for. If not provided or empty, you will receive events for all DIDs.