feat: fix a typo in the worker script

Co-authored-by: Artem Zakharchenko <kettanaito@gmail.com>

src/mockServiceWorker.js

@@ -200,7 +200,7 @@ async function getResponse(event, client, requestId) {
 
   function passthrough() {
     // Clone the request because it might've been already used
-    // (i.e. its body has been read and sent to the cilent).
+    // (i.e. its body has been read and sent to the client).
     const headers = Object.fromEntries(clonedRequest.headers.entries())
 
     // Remove MSW-specific request headers so the bypassed requests