build(deps): bump katex in the npm_and_yarn group across 1 directory

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


Updates `katex` from 0.16.10 to 0.16.21
- [Release notes](https://github.com/KaTeX/KaTeX/releases)
- [Changelog](https://github.com/KaTeX/KaTeX/blob/main/CHANGELOG.md)
- [Commits](https://github.com/KaTeX/KaTeX/compare/v0.16.10...v0.16.21)

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

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -82,7 +82,7 @@
 		"i18next-resources-to-backend": "^1.2.0",
 		"idb": "^7.1.1",
 		"js-sha256": "^0.10.1",
-		"katex": "^0.16.9",
+		"katex": "^0.16.21",
 		"marked": "^9.1.0",
 		"mermaid": "^10.9.3",
 		"paneforge": "^0.0.6",