Bump katex from 0.16.20 to 0.16.21

Bumps [katex](https://github.com/KaTeX/KaTeX) from 0.16.20 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@v0.16.20...v0.16.21)

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

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

Author: dependabot[bot]

package.json

@@ -36,7 +36,7 @@
     "gray-matter": "^4.0.3",
     "hast-util-is-element": "1.1.0",
     "http-proxy-middleware": "2.0.7",
-    "katex": "^0.16.19",
+    "katex": "^0.16.21",
     "node-fetch": "^3.3.2",
     "prism-react-renderer": "^2.4.1",
     "react": "^18.2.0",

yarn.lock

@@ -7073,10 +7073,10 @@ jsonfile@^6.0.1:
   optionalDependencies:
     graceful-fs "^4.1.6"
 
-katex@^0.16.0, katex@^0.16.19, katex@^0.16.9:
-  version "0.16.20"
-  resolved "https://registry.yarnpkg.com/katex/-/katex-0.16.20.tgz#75c741ded0f7ee8d896a1d31bac307e61af863c3"
-  integrity sha512-jjuLaMGD/7P8jUTpdKhA9IoqnH+yMFB3sdAFtq5QdAqeP2PjiSbnC3EaguKPNtv6dXXanHxp1ckwvF4a86LBig==
+katex@^0.16.0, katex@^0.16.21, katex@^0.16.9:
+  version "0.16.21"
+  resolved "https://registry.yarnpkg.com/katex/-/katex-0.16.21.tgz#8f63c659e931b210139691f2cc7bb35166b792a3"
+  integrity sha512-XvqR7FgOHtWupfMiigNzmh+MgUVmDGU2kXZm899ZkPfcuoPuFxyHmXsgATDpFZDAXCI8tvinaVcDo8PIIJSo4A==
   dependencies:
     commander "^8.3.0"