Bump geist from 1.3.1 to 1.4.2

Bumps [geist](https://github.com/vercel/geist-font/tree/HEAD/packages/next) from 1.3.1 to 1.4.2.
- [Release notes](https://github.com/vercel/geist-font/releases)
- [Commits](https://github.com/vercel/geist-font/commits/1.4.2/packages/next)

---
updated-dependencies:
- dependency-name: geist
  dependency-version: 1.4.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -49,7 +49,7 @@
     "clsx": "2.1.1",
     "date-fns": "4.1.0",
     "front-matter": "4.0.2",
-    "geist": "1.3.1",
+    "geist": "1.4.2",
     "lucide-react": "0.456.0",
     "next": "15.3.2",
     "next-mdx-remote": "5.0.0",