Update egg-spigot.json

[Link0Darck]

add java version 21 and works

Description

Checklist for all submissions

• [ ] Have you followed the guidelines in our Contributing document?
• [ ] 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?
• [ ] Did you branch your changes and PR from that branch and not from your master branch?
  • If not, why?:

• [ ] You verify that the start command applied does not use a shell script
  • [ ] If some script is needed then it is part of a current yolk or a PR to add one
• [x] The egg was exported from the panel

New egg Submissions

1. [x] Does your submission pass tests (server is connectable)?
2. [ ] Does your egg use a custom docker image?
   • [ ] Have you tried to use a generic image?
   • [ ] Did you PR the necessary changes to make it work?
3. [ ] Have you added the egg to the main README.md and any other README files in subdirectories of the egg (e.g /game_eggs) according to the alphabetical order?
4. [ ] Have you added a unique README.md for the egg you are adding according to the alphabetical order?
5. [ ] You verify that the start command applied does not use a shell script
   • [ ] If some script is needed then it is part of a current yolk or a PR to add one
6. [x] The egg was exported from the panel

[Link0Darck]

I just saw how the egg is made then I add Java 21 from yolk then modify the script and test on my panel and export the json

[QuintenQVD0]

Please adapt your changes to this PR: https://github.com/pelican-eggs/minecraft/pull/4

(The images all changed as we will not be using the pterodactyl ones anymore)

[Link0Darck]

Please adapt your changes to this PR: #4

(The images all changed as we will not be using the pterodactyl ones anymore)

It's good I did it then I tested it on my machine and it works