Bump Jekyll to v4.2.2

[liblaf]

Jekyll v4.x is now available.
There are some useful new features like slugified_categories.
Hope github-pages will keep jekyll dependency update to date.

[phineas-pta]

you can see this thread #651

[waldyrious]

Relevant pull request: #822

[RalphHightower]

Jekyll 4.3.3 is now available.

Jekyll Release	Release Date
4.3.3	2023-12-27
4.3.2	2023-01-20
4.3.1	2022-10-26
4.3.0	2022-10-20
4.2.2	2022-03-03