Bump katex from 0.16.3 to 0.16.4 (#1007)

Bumps [katex](https://github.com/KaTeX/KaTeX) from 0.16.3 to 0.16.4.
- [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/v0.16.3...v0.16.4)

---
updated-dependencies:
- dependency-name: katex
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -28,7 +28,7 @@
     "flux": "4.0.3",
     "formik": "2.2.9",
     "html-react-parser": "3.0.4",
-    "katex": "0.16.3",
+    "katex": "0.16.4",
     "linkify-html": "4.0.2",
     "linkifyjs": "4.0.2",
     "matrix-js-sdk": "21.2.0",