Fix port typo

docs/configuring-playbook-own-webserver.md

@@ -176,7 +176,7 @@ matrix_synapse_container_extra_arguments:
 
 This method uses labels attached to the Nginx and Synapse containers to provide the Traefik Docker provider with the information it needs to proxy `matrix.DOMAIN`, `riot.DOMAIN`, and `dimension.DOMAIN`. Some [static configuration](https://docs.traefik.io/v2.0/reference/static-configuration/file/) is required in Traefik; namely, having endpoints on ports 443 and 8448 and having a certificate resolver.
 
-Note that this configuration on its own does **not** redirect traffic on port 80 (plain HTTP) to port 433 for HTTPS, which may cause some issues, since the built-in Nginx proxy usually does this. If you are not already doing this in Traefik, it can be added to Traefik in a [file provider](https://docs.traefik.io/v2.0/providers/file/) as follows:
+Note that this configuration on its own does **not** redirect traffic on port 80 (plain HTTP) to port 443 for HTTPS, which may cause some issues, since the built-in Nginx proxy usually does this. If you are not already doing this in Traefik, it can be added to Traefik in a [file provider](https://docs.traefik.io/v2.0/providers/file/) as follows:
 
 ```toml
 [http]