example: Use location pathname when saving search parameters (livekit…

…#178)

If the sample is hosted from a path other than `/`, it would get reset
to the root path. Set the path based on the current location when adding
the search parameters.

example/sample.ts

@@ -26,7 +26,11 @@ const storedToken = searchParams.get('token') ?? '';
 
 function updateSearchParams(url: string, token: string) {
  const params = new URLSearchParams({ url, token });
- window.history.replaceState(null, '', `/?${params.toString()}`);
+ window.history.replaceState(
+ null,
+ '',
+ `${window.location.pathname}?${params.toString()}`,
+ );
 }
 
 // handles actions from the HTML