deps: bump the build-tools group in /demo with 2 updates (#233)

Bumps the build-tools group in /demo with 2 updates: [next](https://github.com/vercel/next.js) and [typescript](https://github.com/microsoft/TypeScript).


Updates `next` from 14.2.14 to 14.2.15
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.14...v14.2.15)

Updates `typescript` from 5.6.2 to 5.6.3
- [Release notes](https://github.com/microsoft/TypeScript/releases)
- [Changelog](https://github.com/microsoft/TypeScript/blob/main/azure-pipelines.release.yml)
- [Commits](microsoft/TypeScript@v5.6.2...v5.6.3)

---
updated-dependencies:
- dependency-name: next
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: build-tools
- dependency-name: typescript
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: build-tools
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

demo/package.json

@@ -13,7 +13,7 @@
   },
   "dependencies": {
     "instant-table": "file:../package",
-    "next": "^14.2.14",
+    "next": "^14.2.15",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-pkg-demo": "^0.10.0"
@@ -25,6 +25,6 @@
     "@types/react": "^18.3.11",
     "@types/react-dom": "^18.2.18",
     "eslint-config-next": "^14.2.15",
-    "typescript": "^5.6.2"
+    "typescript": "^5.6.3"
   }
 }