fix/typo (#273)

Author: TimoNeyer

src/pages/selfhosted/selfhosted-guide.mdx

@@ -23,7 +23,7 @@ NetBird with custom IdPs.
 - Any Linux OS.
 - Docker Compose installed (see [Install Docker Compose](https://docs.docker.com/compose/install/)).
 - Domain name pointing to the public IP address of your server.
-- Open TCP ports ```80, 443, 33073, 10000, 33080``` (Dashboard HTTP & HTTPS, Management gRCP & HTTP APIs, Signal gRPC API, Relay respectively) on your server.
+- Open TCP ports ```80, 443, 33073, 10000, 33080``` (Dashboard HTTP & HTTPS, Management gRPC & HTTP APIs, Signal gRPC API, Relay respectively) on your server.
 - Coturn is used for relay using the STUN/TURN protocols. It requires a listening port, `UDP 3478`, and range of ports, `UDP 49152-65535`, for dynamic relay connections. These are set as defaults in setup file, but can be configured to your requirements.
 - Maybe a cup of coffee or tea :)