fix

[msaroufim]

Description

Please provide a brief summary of the changes in this pull request.

Checklist

Before submitting this PR, ensure the following steps have been completed:

• Run the slash command /verifyruns on your own server.
  • Run the cluster bot on your server:

    python discord-bot.py

  • Start training runs with the slash command /verifyruns.
  • Verify that the bot eventually responds with:

    ✅ All runs completed successfully!
    

    (It may take a few minutes for all runs to finish. In particular, the GitHub
    runs may take a little longer. The Modal run is typically quick.)
    For more information on running a cluster bot on your own server, see
    README.md.

[Copilot]

Pull Request Overview

This PR makes minor fixes to the admin cog functionality, including a code style improvement and adding proper permission validation.

• Fixed string quote style consistency in datetime formatting
• Added admin permission check to the get_submission_by_id command

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_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[github-actions]

Coverage report

This PR does not seem to contain any modification to coverable code.

[S1ro1]

LGTM. we for sure should have it by default.