Update jekyll requirement from 3.8.5 to 3.8.6
Update jekyll requirement from 3.8.5 to 3.8.6

Updates the requirements on [jekyll](https://github.com/jekyll/jekyll) to permit the latest version.
- [Release notes](https://github.com/jekyll/jekyll/releases)
- [Changelog](https://github.com/jekyll/jekyll/blob/master/History.markdown)
- [Commits](https://github.com/jekyll/jekyll/compare/v3.8.5...v3.8.6)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
ferrarimarco/personal-website,ferrarimarco/personal-website,ferrarimarco/personal-website,ferrarimarco/personal-website