MathJax broken on Flower blog/wiki

[brainexcerpts]

MathJax is not loading on pages like:
https://copyme.github.io/flower/mean-curvature/

I think it points to an old version, just replacing with a newer repository will fix the issue
<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML" id=""></script>

(sorry I couldn't find any other place to contact you.