Bump jekyll from 3.1.6 to 3.6.3
Bump jekyll from 3.1.6 to 3.6.3

Bumps [jekyll](https://github.com/jekyll/jekyll) from 3.1.6 to 3.6.3.
- [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/v3.1.6...v3.6.3)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
atmos/atmos.github.io,atmos/atmos.github.io