Change example to use .park instead of SV6

Author: Gymnasiast

README.md

@@ -20,12 +20,12 @@ $ docker run --rm -p 11753:11753 -it openrct2/openrct2-cli host https://bit.do/o
 All configuration data is stored inside the container. If you want to persist it outside the container, you can mount it to a volume or your local filesystem. Mounting your local filesystem also allows you to read and write saved games locally. For example:
 
 ```
-$ docker run --rm -p 11753:11753 -v /home/me/openrct2-config:/home/openrct2/.config/OpenRCT2 -it openrct2/openrct2-cli host /home/openrct2/.config/OpenRCT2/save/mypark.sv6
+$ docker run --rm -p 11753:11753 -v /home/me/openrct2-config:/home/openrct2/.config/OpenRCT2 -it openrct2/openrct2-cli host /home/openrct2/.config/OpenRCT2/save/mypark.park
 ```
 
 The command above will mount the OpenRCT2 user / config directory inside the container to a directory on your local filesystem. This will allow you to persist and edit the configuration, saved games etc. locally.
 
-It will then host a new server and load the saved game `mypark.sv6` located in the mounted directory under the save subdirectory.
+It will then host a new server and load the saved game `mypark.park` located in the mounted directory under the save subdirectory.
 
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