docker compose small fix

[teolemon]

Story

• docker compose --env-file=.env run --rm -w /parser taxonomy_api flake8 --exclude=.venv /parser
  time="2026-07-09T09:13:04Z" level=warning msg="/home/runner/work/taxonomy-editor/taxonomy-editor/docker-compose.yml: the attribute version is obsolete, it will be ignored, please remove it to avoid potential confusion"
  time="2026-07-09T09:13:04Z" level=warning msg="/home/runner/work/taxonomy-editor/taxonomy-editor/docker/dev.yml: the attribute version is obsolete, it will be ignored, please remove it to avoid potential confusion"

[alexgarel]

@teolemon it's really just about removing the "version:…" in the docker compose