remove useles gif - Githubissues

PR Checklist

If you are contributing to JavisNB.jl, please make sure you are able to check off each item on this list:

[ ] Did I update CHANGELOG.md with whatever changes/features I added with this PR?
[ ] Did I make sure to only change the part of the file where I introduced a new change/feature?
[ ] Did I cover all corner cases to be close to 100% test coverage (if applicable)?
[ ] Did I properly add JavisNB dependencies to the Project.toml + set an upper bound of the dependency (if applicable)?
[ ] Did I properly add test dependencies to the test directory (if applicable)?
[ ] Did I check relevant tutorials that may be affected by changes in this PR?
[ ] Did I clearly articulate why this PR was made the way it was and how it was made?

Removes useless gif and makes CI run