`Podman-compose.yml` gives warning about attribute `version` being obsolete

### Description

Due to the attribute `version` being obsolete, it should be removed from the file.
It shows a warning in the terminal every time the developer sets up their apps locally with `podman compose --file podman-compose.yml up -d`.

### Additional Information

_No response_

### Tasks

_No response_

### Acceptance Criterias

_No response_