Bump jekyll from 4.0.0 to 4.0.1

Bumps jekyll from 4.0.0 to 4.0.1.

Release notes

Sourced from jekyll's releases.

v4.0.1

Bug Fixes

• Prevent console warnings with Ruby 2.7 (#8124)
• Clear cached Liquid template scope before render (#8141)
• Add static file's basename to its url_placeholder (#8142)
• Update item_property to recognize integers (#8160)

Development Fixes

• Fix Kramdown converter based tests for v4.0.x (#8143)

Changelog

Sourced from jekyll's changelog.

4.0.1 / 2020-05-08

Bug Fixes

• Prevent console warning with Ruby 2.7 (#8124)
• Clear cached Liquid template scope before render (#8141)
• Add static file's basename to its url_placeholder (#8142)
• Update item_property to recognize integers (#8160)

Development Fixes

• Fix Kramdown converter based tests for v4.0.x (#8143)

Commits

• 8dfb549 Release 💎 4.0.1
• c9aa19c chore(release): v4.0.1 💎
• ddc060c Update history to reflect merge of #8160 [ci skip]
• 587cb9b Backport #7878 for v4.0.x (#8160)
• 3845850 Update history to reflect merge of #8142 [ci skip]
• 4c124cc Backport #7908 for v4.0.x (#8142)
• 3014f8d Update history to reflect merge of #8141 [ci skip]
• de89a60 Backport #7967 for v4.0.x (#8141)
• 830c1e6 Merge branch '4.0-stable' into this branch
• 94f60cb Update history to reflect merge of #8143 [ci skip]
• Additional commits viewable in compare view