chore: Drop version key from the Docker Compose files (#1396)

The `version` key is deprecated in recent version of Docker Compose.

Related to request #37907 Update dev/build environment [W17 2024]

languages/en/installation-guide/docker/docker_compose.rst

@@ -48,8 +48,6 @@ Then create a ``compose.yaml`` file with following content:
 
 .. code-block:: yaml
 
-    version: "2"
-
     services:
       web:
         image: tuleap/tuleap-community-edition
@@ -109,8 +107,6 @@ Please check the :ref:`environment variables <docker-environment-variables>` to
 
 .. code-block:: yaml
 
-    version: "2"
-
     services:
     tuleap:
         image: docker.tuleap.org/tuleap-enterprise-edition:${TULEAP-VERSION}