Remove version from docker compose since it's been deprecated (#2816)

docs/configuration/interpolating.md

@@ -66,7 +66,6 @@ database:
 This is how your `docker-compose.yml` file could look like:
 
 ```yml
-version: "3.8"
 # Other docker-compose examples in /examples
 
 services:

docs/data-directory.md

@@ -31,7 +31,6 @@ When attached in this way you can stop the server, edit the configuration under
 With Docker Compose, setting up a host attached directory is even easier since relative paths can be configured. For example, with the following `docker-compose.yml` Docker will automatically create/attach the relative directory `minecraft-data` to the container.
 
 ``` yaml title="docker-compose.yml"
-version: "3"
 
 services:
   mc:

docs/index.md

@@ -39,7 +39,6 @@ By default, the container will download the latest version of the "vanilla" [Min
 4. Done! Point your client at your host's name/IP address and port 25565.
 
 ```yaml
-version: "3.8"
 
 services:
   mc:

docs/misc/examples.md

@@ -7,7 +7,6 @@ Various examples are [maintained in the repository](https://github.com/itzg/dock
 Using the [GeyserMC plugin](https://geysermc.org/) with a Paper server (or similar) "enables clients from Minecraft Bedrock Edition to join your Minecraft Java server". The example also includes [Floodgate](https://wiki.geysermc.org/floodgate/) which "allows Xbox Live authenticated Bedrock users to join without a Java Edition account". 
 
 ```yaml
-version: "3.8"
 
 services:
   mc:
@@ -33,7 +32,6 @@ Monitors network traffic to the Minecraft containers. If there is traffic, the c
 By using [Lazytainer](https://github.com/vmorganp/Lazytainer) with the [docker-minecraft-server](https://github.com/itzg/docker-minecraft-server) a somehow similar behaviour to [Lazymc](https://github.com/timvisee/lazymc) can be archived.
 
 ```yaml
-version: "3"
 services:
   lazytainer:
     image: ghcr.io/vmorganp/lazytainer:master