Merge pull request 0xPolygon#167 from 0xPolygon/djpolygon/polyfill_up…

…date

Updating polyfill service url

mkdocs.yml

@@ -82,7 +82,7 @@ validation:
   absolute_links: ignore
 
 extra_javascript:
-  - https://polyfill.io/v3/polyfill.min.js?features=es6
+  - https://cdnjs.cloudflare.com/polyfill/
   - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
   - https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.16.7/katex.min.js
   - https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.16.7/contrib/auto-render.min.js