Bump mathjax to latest version according to mkdocs-material

docs/javascript/mathjax.js

@@ -0,0 +1,16 @@
+window.MathJax = {
+  tex: {
+    inlineMath: [["\\(", "\\)"]],
+    displayMath: [["\\[", "\\]"]],
+    processEscapes: true,
+    processEnvironments: true
+  },
+  options: {
+    ignoreHtmlClass: ".*|",
+    processHtmlClass: "arithmatex"
+  }
+};
+
+document$.subscribe(() => {
+  MathJax.typesetPromise()
+})

mkdocs.yml

@@ -48,7 +48,9 @@ nav:
     - 仿真: hdl-by-example/simulation.md
 
 extra_javascript:
-  - 'https://cdn.jsdelivr.net/npm/mathjax@2.7.0/MathJax.js?config=TeX-MML-AM_CHTML'
+  - javascripts/mathjax.js
+  - https://polyfill.io/v3/polyfill.min.js?features=es6
+  - https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
 
 plugins:
   - search