Bump remark-math from 5.1.1 to 6.0.0 in /frontend

Bumps [remark-math](https://github.com/remarkjs/remark-math) from 5.1.1 to 6.0.0.
- [Release notes](https://github.com/remarkjs/remark-math/releases)
- [Commits](remarkjs/remark-math@5.1.1...6.0.0)

---
updated-dependencies:
- dependency-name: remark-math
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

frontend/package.json

@@ -47,7 +47,7 @@
     "rehype-katex": "^6.0.3",
     "rehype-raw": "^7.0.0",
     "remark-gfm": "^3.0.1",
-    "remark-math": "^5.1.1",
+    "remark-math": "^6.0.0",
     "remark-rehype": "^11.1.0",
     "tailwind-merge": "^2.5.5",
     "tailwindcss-animate": "^1.0.7",