Bump typescript from 5.6.3 to 6.0.3 in /book (#12)

Bumps [typescript](https://github.com/microsoft/TypeScript) from 5.6.3 to 6.0.3.
- [Release notes](https://github.com/microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v5.6.3...v6.0.3)

---
updated-dependencies:
- dependency-name: typescript
  dependency-version: 6.0.3
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

book/bun.lock

@@ -30,7 +30,7 @@
     "@docusaurus/module-type-aliases": "3.10.1",
     "@docusaurus/tsconfig": "3.10.1",
     "@docusaurus/types": "3.10.1",
-    "typescript": "~5.6.2"
+    "typescript": "~6.0.3"
   },
   "browserslist": {
     "production": [