services: fix warning 'version' is obsolete

[Samk13]

❤️ Thank you for your contribution!

Description

While executing tests on other packages namely invenio-files-rest, I encountered a warning:
WARN[0000] site-packages/docker_services_cli/docker-services.yml: "version" is obsolete.
Upon further investigation, it appears that the version field is now redundant and can be safely removed to prevent this warning docker/compose#11628.

This PR addresses this issue by removing the obsolete version field from the docker-compose file.

Checklist

Ticks in all boxes and 🟢 on all GitHub actions status checks are required to merge:

• I'm aware of the code of conduct.
• I've created logical separate commits and followed the commit message format.
• I've added relevant test cases.
• I've added relevant documentation.
• I've marked translation strings (for relevant code).
• I've followed the CSS/JS and React guidelines (for relevant code).
• I've followed the web accessibility guidelines (for relevant code).
• I've followed the user interface guidelines (for relevant code).
• I've identified the copyright holder(s) and updated copyright headers for touched files (>15 lines contributions).
• I've NOT included third-party code (copy/pasted source code or new dependencies).

Third-party code

If you've added third-party code (copy/pasted or new dependencies), please reach out to an architect.

Reminder

By using GitHub, you have already agreed to the GitHub’s Terms of Service including that:

1. You license your contribution under the same terms as the current repository’s license.
2. You agree that you have the right to license your contribution under the current repository’s license.