Bump shiki from 3.23.0 to 4.0.2 (#378)

Bumps [shiki](https://github.com/shikijs/shiki/tree/HEAD/packages/shiki) from 3.23.0 to 4.0.2.
- [Release notes](https://github.com/shikijs/shiki/releases)
- [Commits](https://github.com/shikijs/shiki/commits/v4.0.2/packages/shiki)

---
updated-dependencies:
- dependency-name: shiki
  dependency-version: 4.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

docs/package.json

@@ -23,7 +23,7 @@
     "openai": "^6.27.0",
     "react": "^19.2.4",
     "react-dom": "^19.2.4",
-    "shiki": "^3.23.0"
+    "shiki": "^4.0.2"
   },
   "devDependencies": {
     "@opensaas/stack-ui": "workspace:*",