added a space cow

[KJeansGR]

Hooray! willyxwonka is the account my PC recognizes as the main account but that is also me, KJeansGR. I hope this isnt an issue

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
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[github-actions]

🧪 PR Validation Results for #20

✅ Check PR is going to correct repo passed!
✅ Check image path passed!
✅ Check image file exists passed!
✅ Check image file size passed!
❌ Image file name in cows/space_cow.json should be based on the cow's name. Expected: images/spacecow.png or .jpg or .jpeg
✅ Check proper indentation passed!
✅ Check line endings passed!

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❌ 6/7 passed. Please fix the issues above and update your PR.