Update egui, with fix for jittering menus

[emilk]

What

• Contains this bug fix: Bug fix: report latest area size in Area::show response emilk/egui#4710

This fixes menus and popups sometimes jittering around the first frame they are shown

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested the web demo (if applicable):
  • Using examples from latest main build: rerun.io/viewer
  • Using full set of examples from nightly build: rerun.io/viewer
• The PR title and labels are set such as to maximize their usefulness for the next release's CHANGELOG
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