Replace MathJax with MathML #73

Job	Run time
submodule (mkdocs-material-insiders, main) / download	15s
submodule (i18n, main) / download	15s
submodule (brand, main) / download	16s
build (he, true) / build	1m 3s
build (fr, true) / build	1m 0s
build (es, true) / build	59s
build (en, false) / build	1m 17s
build (it, true) / build	1m 4s
build (nl, true) / build	1m 23s
build (zh-Hant, true) / build	1m 8s
build (ru, true) / build	1m 31s
deploy	1s
cleanup / cleanup	5s
comment	1s
	10m 18s

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