Bump typedoc from 0.26.7 to 0.28.9

Bumps [typedoc](https://github.com/TypeStrong/TypeDoc) from 0.26.7 to 0.28.9.
- [Release notes](https://github.com/TypeStrong/TypeDoc/releases)
- [Changelog](https://github.com/TypeStrong/typedoc/blob/master/CHANGELOG.md)
- [Commits](TypeStrong/typedoc@v0.26.7...v0.28.9)

---
updated-dependencies:
- dependency-name: typedoc
  dependency-version: 0.28.9
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs-src/package.json

@@ -19,7 +19,7 @@
     "shepherd.js": "workspace:*",
     "starlight-typedoc": "^0.18.0",
     "tailwindcss": "^3.4.17",
-    "typedoc": "^0.26.7",
+    "typedoc": "^0.28.9",
     "typedoc-plugin-markdown": "4.2.9",
     "typescript": "^5.7.3"
   },