Bump katex from 0.16.11 to 0.16.21 in the npm_and_yarn group

Bumps the npm_and_yarn group with 1 update: [katex](https://github.com/KaTeX/KaTeX).


Updates `katex` from 0.16.11 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@v0.16.11...v0.16.21)

---
updated-dependencies:
- dependency-name: katex
  dependency-type: direct:production
  dependency-group: npm_and_yarn
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -31,7 +31,7 @@
     "clsx": "^2.0.0",
     "docusaurus-plugin-sass": "^0.2.5",
     "jssha": "^3.3.1",
-    "katex": "^0.16.11",
+    "katex": "^0.16.21",
     "prism-react-renderer": "^2.3.0",
     "react": "^18.0.0",
     "react-bootstrap": "^2.10.2",