chore(frontend): bump @types/marked in /services/frontend

Bumps [@types/marked](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/marked) from 5.0.2 to 6.0.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/marked)

---
updated-dependencies:
- dependency-name: "@types/marked"
  dependency-version: 6.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

services/frontend/package.json

@@ -41,7 +41,7 @@
     "@release-it/conventional-changelog": "^10.0.1",
     "@tailwindcss/postcss": "^4.1.14",
     "@tsconfig/node22": "^22.0.2",
-    "@types/marked": "^5.0.2",
+    "@types/marked": "^6.0.0",
     "@types/node": "^24.5.2",
     "@types/prismjs": "^1.26.5",
     "@vitejs/plugin-vue": "^6.0.1",