build: bump undici from 5.29.0 to 7.8.0 in /src/frontend

Bumps [undici](https://github.com/nodejs/undici) from 5.29.0 to 7.8.0.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v5.29.0...v7.8.0)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 7.8.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

src/frontend/package-lock.json

@@ -36,7 +36,7 @@
     "rehype-raw": "^7.0.0",
     "remark-gfm": "^4.0.0",
     "remark-supersub": "^1.0.0",
-    "undici": "^5.0.0"
+    "undici": "^7.8.0"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.1",