Update MathJax to 3.2.2 (#1844)

(cherry picked from commit 06e0140)

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Documenter.jl changelog
 
+## Version `v0.27.20`
+
+* ![Enhancement][badge-enhancement] MathJax 3 has been updated to `v3.2.2` (minor version bump). ([#1844][github-1844])
+
 ## Version `v0.27.19`
 
 * ![Enhancement][badge-enhancement] Documenter can now build draft version of HTML documentation by passing `draft=true` to `makedocs`. Draft mode skips potentially expensive parts of the building process and can be useful to get faster feedback when writing documentation. Draft mode currently skips doctests, `@example`-, `@repl`-, `@eval`-, and `@setup`-blocks. Draft mode can be disabled (or enabled) on a per-page basis by setting `Draft = true` in an `@meta` block. ([#1836][github-1836])
@@ -1051,6 +1055,7 @@
 [github-1834]: https://github.com/JuliaDocs/Documenter.jl/pull/1834
 [github-1836]: https://github.com/JuliaDocs/Documenter.jl/pull/1836
 [github-1838]: https://github.com/JuliaDocs/Documenter.jl/pull/1838
+[github-1844]: https://github.com/JuliaDocs/Documenter.jl/pull/1844
 <!-- end of issue link definitions -->
 
 [julia-38079]: https://github.com/JuliaLang/julia/issues/38079

src/Writers/HTMLWriter.jl

@@ -615,7 +615,7 @@ module RD
         ))
     end
     function mathengine!(r::RequireJS, engine::MathJax3)
-        url = isempty(engine.url) ? "https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.0/es5/tex-svg.js" : engine.url
+        url = isempty(engine.url) ? "https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-svg.js" : engine.url
         push!(r, Snippet([], [],
             """
             window.MathJax = $(json_jsescape(engine.config, 2));