chore: bump prettier from 3.6.2 to 3.7.3 in /site

Bumps [prettier](https://github.com/prettier/prettier) from 3.6.2 to 3.7.3.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@3.6.2...3.7.3)

---
updated-dependencies:
- dependency-name: prettier
  dependency-version: 3.7.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]