Chore(deps): Bump @notionhq/client from 2.3.0 to 4.0.1

Bumps [@notionhq/client](https://github.com/makenotion/notion-sdk-js) from 2.3.0 to 4.0.1.
- [Release notes](https://github.com/makenotion/notion-sdk-js/releases)
- [Commits](makenotion/notion-sdk-js@v2.3.0...v4.0.1)

---
updated-dependencies:
- dependency-name: "@notionhq/client"
  dependency-version: 4.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

apps/contact/package.json

@@ -12,7 +12,7 @@
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "next": "15.2.3",
-    "@notionhq/client": "^2.2.15",
+    "@notionhq/client": "^4.0.1",
     "@upstash/ratelimit": "^2.0.5",
     "@upstash/redis": "^1.34.3",
     "nanoid": "^5.0.9",