Bump katex from 0.16.19 to 0.16.21 (#236)

Bumps [katex](https://github.com/KaTeX/KaTeX) from 0.16.19 to 0.16.21.
- [Release notes](https://github.com/KaTeX/KaTeX/releases)
- [Changelog](https://github.com/KaTeX/KaTeX/blob/main/CHANGELOG.md)
- [Commits](KaTeX/KaTeX@v0.16.19...v0.16.21)

---
updated-dependencies:
- dependency-name: katex
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

yarn.lock

@@ -14626,13 +14626,13 @@ __metadata:
   linkType: hard
 
 "katex@npm:^0.16.9":
-  version: 0.16.19
-  resolution: "katex@npm:0.16.19"
+  version: 0.16.21
+  resolution: "katex@npm:0.16.21"
   dependencies:
     commander: "npm:^8.3.0"
   bin:
     katex: cli.js
-  checksum: 10c0/41d53eded6984b6edf5e53ee92e1c5cf1e7a964d225191b5a5565f6fe5f78e9ac79eb873fc546975adf585cb99fdd744fc9b31afd3070bb0905598d1384c7559
+  checksum: 10c0/e2e4139ba72a13f2393308fbb2b4c5511611a19a40a6e39d956cf775e553af3517dbfd0a54477faaf401c923e4654e32296347846b8ff15dfa579f88ff8579bb
   languageName: node
   linkType: hard