refactor: fix typos (#18000)

packages/platform-webworker/src/web_workers/shared/message_bus.ts

@@ -84,7 +84,7 @@ export interface MessageBusSink {
    * Sets up a new channel on the MessageBusSink.
    * MUST be called before calling to on the channel.
    * If runInZone is true the sink will buffer messages and send only once the zone exits.
-   * if runInZone is false the sink will send messages immediatly.
+   * if runInZone is false the sink will send messages immediately.
    */
   initChannel(channel: string, runInZone: boolean): void;
 

packages/platform-webworker/test/web_workers/shared/message_bus_spec.ts

@@ -142,7 +142,7 @@ export function main() {
                }),
        500);
 
-    it('should send messages immediatly when run outside the zone',
+    it('should send messages immediately when run outside the zone',
        inject([AsyncTestCompleter, NgZone], (async: AsyncTestCompleter, zone: MockNgZone) => {
          bus = createConnectedMessageBus();
          setup(false, zone);