Upgrade: Bump hexo from 3.8.0 to 3.9.0

Bumps [hexo](https://github.com/hexojs/hexo) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/hexojs/hexo/releases)
- [Commits](hexojs/hexo@3.8.0...3.9.0)

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

Author: dependabot-preview[bot]