Replace lines for LiveKit services with one for Matrix RTC stack

Signed-off-by: Suguru Hirahara <did🔑z6MkvVZk1A3KBApWJXv2Ju4H14ErDfRGxh8zxdXSZ4vACDg5>

README.md

@@ -79,8 +79,7 @@ Services that run on the server to make the various parts of your installation w
 | [Let's Encrypt](https://letsencrypt.org/) | ✅ | Free SSL certificate, which secures the connection to all components | [Link](docs/configuring-playbook-ssl-certificates.md) |
 | [Exim](https://www.exim.org/) | ✅ | Mail server, through which all Matrix services send outgoing email (can be configured to relay through another SMTP server) | [Link](docs/configuring-playbook-email.md) |
 | [ddclient](https://github.com/linuxserver/docker-ddclient) | ❌ | Dynamic DNS | [Link](docs/configuring-playbook-dynamic-dns.md) |
-| [LiveKit Server](https://github.com/livekit/livekit) | ❌ | WebRTC server for audio/video calls | [Link](docs/configuring-playbook-livekit-server.md) |
-| [Livekit JWT Service](https://github.com/livekit/livekit-jwt-service) | ❌ | JWT service for integrating [Element Call](./configuring-playbook-element-call.md) with [LiveKit Server](./configuring-playbook-livekit-server.md) | [Link](docs/configuring-playbook-livekit-jwt-service.md) |
+| Matrix RTC stack | ❌ | Supporting components ([LiveKit Server](docs/configuring-playbook-livekit-server.md) and [LiveKit JWT Service](docs/configuring-playbook-livekit-jwt-service.md)) for in-app audio/video calls for Matrix clients | [Link](docs/configuring-playbook-matrix-rtc.md) |
 
 ### Authentication