fixed broken links in README (#641)

Author: davidzhao

README.md

@@ -13,7 +13,9 @@
 # LiveKit Flutter SDK
 
 <!--BEGIN_DESCRIPTION-->
+
 Use this SDK to add realtime video, audio and data features to your Flutter app. By connecting to <a href="https://livekit.io/">LiveKit</a> Cloud or a self-hosted server, you can quickly build applications such as multi-modal AI, live streaming, or video calls with just a few lines of code.
+
 <!--END_DESCRIPTION-->
 
 This package is published to pub.dev as [livekit_client](https://pub.dev/packages/livekit_client).
@@ -476,7 +478,7 @@ When subscribing to remote tracks, the client has precise control over status of
 
 These controls are accessible on the `RemoteTrackPublication` object.
 
-For more info, see [Subscriber controls](https://docs.livekit.io/guides/room/receive#subscriber-controls).
+For more info, see [Subscribing to tracks](https://docs.livekit.io/home/client/tracks/subscribe/).
 
 ## Getting help / Contributing
 
@@ -491,7 +493,9 @@ Apache License 2.0
 A huge thank you to [flutter-webrtc](https://github.com/flutter-webrtc/flutter-webrtc) for making it possible to use WebRTC in Flutter.
 
 <!--BEGIN_REPO_NAV-->
+
 <br/><table>
+
 <thead><tr><th colspan="2">LiveKit Ecosystem</th></tr></thead>
 <tbody>
 <tr><td>Realtime SDKs</td><td><a href="https://github.com/livekit/components-js">React Components</a> · <a href="https://github.com/livekit/client-sdk-js">Browser</a> · <a href="https://github.com/livekit/components-swift">Swift Components</a> · <a href="https://github.com/livekit/client-sdk-swift">iOS/macOS/visionOS</a> · <a href="https://github.com/livekit/client-sdk-android">Android</a> · <b>Flutter</b> · <a href="https://github.com/livekit/client-sdk-react-native">React Native</a> · <a href="https://github.com/livekit/rust-sdks">Rust</a> · <a href="https://github.com/livekit/node-sdks">Node.js</a> · <a href="https://github.com/livekit/python-sdks">Python</a> · <a href="https://github.com/livekit/client-sdk-unity-web">Unity (web)</a> · <a href="https://github.com/livekit/client-sdk-unity">Unity (beta)</a></td></tr><tr></tr>