Update docker-minecraft-server docs url (#49)

Author: rhullah

docs/tutorials/installing/packwiz-installer.md

@@ -33,6 +33,6 @@ You can use [packwiz-installer] to download non-client mods (side either `both`
 - `-g` flag to disable the GUI
 - `-s server` to download only server-side mods.
 
-itzg's [docker-minecraft-server](https://github.com/itzg/docker-minecraft-server) has built in support for packwiz. You can pass the `PACKWIZ_URL` environment variable pointing to your pack's TOML file, and the container will bootstrap packwiz-installer and install/update the provided pack. See [the documentation](https://github.com/itzg/docker-minecraft-server#running-a-server-with-a-packwiz-modpack) for more information.
+itzg's [docker-minecraft-server](https://github.com/itzg/docker-minecraft-server) has built in support for packwiz. You can pass the `PACKWIZ_URL` environment variable pointing to your pack's TOML file, and the container will bootstrap packwiz-installer and install/update the provided pack. See [the documentation](https://docker-minecraft-server.readthedocs.io/en/latest/mods-and-plugins/packwiz/) for more information.
 
 [packwiz-installer]: https://github.com/packwiz/packwiz-installer