build(deps): bump fumadocs-ui from 16.4.7 to 16.6.5

Bumps [fumadocs-ui](https://github.com/fuma-nama/fumadocs) from 16.4.7 to 16.6.5.
- [Release notes](https://github.com/fuma-nama/fumadocs/releases)
- [Commits](https://github.com/fuma-nama/fumadocs/commits/fumadocs-ui@16.6.5)

---
updated-dependencies:
- dependency-name: fumadocs-ui
  dependency-version: 16.6.5
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]