Update dependency jekyll to v4.3.4

This MR contains the following updates:

Package	Update	Change
jekyll (source, changelog)	patch	4.3.3 -> 4.3.4

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Release Notes

jekyll/jekyll (jekyll)

v4.3.4

Compare Source

Bug Fixes

• Backport #​9662 for v4.3.x: Relax version constraint on wdm in new Gemfile (#​9683)
• Backport #​9680 for v4.3.x: Render theme-gem root only in development (#​9684)

Development Fixes

• Sync workflows with counterparts on master (#​9681)

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