Update to latest egui master, with fixes for notebook focus

[jleibs]

What

• Closes Rerun notebook widget eavesdrops on keyboard events while typing in another cell #6638
• Uses eframe web: ignore keyboard events unless canvas has focus emilk/egui#4718

Instructions:

pixi run -e examples py-build-notebook
pixi run -e examples jupyter notebook examples/python/notebook/cube.ipynb

Run the first few 3 cells.

Known issues:

• Hitting 'a' when the viewer selected still bypasses Rerun and adds a new preceding cell in the notebook. This is because of how Jupyter Notebook Classic does things.

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
• If applicable, add a new check to the release checklist!

• PR Build Summary
• Recent benchmark results
• Wasm size tracking

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