Update egg-fabric.json to fix installation container

[Telokis]

Description

The installation container was invalid and simply didn't work with the error

ERROR: [Nov  6 17:06:39.491] failed to run install process for server error=failed to pull updated installation container image for server: Error response from daemon: manifest for openjdk:11-jdk-slim not found: manifest unknown: manifest

Checklist for all submissions

• [x] Have you followed the guidelines in our Contributing document?
• [x] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• [x] Have you tested and reviewed your changes with confidence that everything works?
• [x] Did you branch your changes and PR from that branch and not from your master branch?
  • If not, why?:

• [x] You verify that the start command applied does not use a shell script
  • [x] If some script is needed then it is part of a current yolk or a PR to add one
• [] The egg was exported from the panel --> No need, I just updated the container property in the JSON.

[Telokis]

I don't understand what just happened. Why are there so many changes? I only wanted to update the container's image.
Should I try on a fresh Pelican install instead?

[SilberGecko6917]

@Telokis No, I think it's fine. The previous version was outdated, but now you've updated it to the newest version. You could also add an image to the egg while you're at it: https://fabricmc.net/assets/logo.png