Update jupyter-html deps to v19.2.6 #1472

Job	Run time
Make RTC sdist	19s
Build RTC wheels (x86_64)	51s
Build RTC wheels (x86_64 arm64)	1m 5s
Build RTC wheels (aarch64)	1m 17s
Generating protobuf	18s
Build RTC wheels (AMD64)	1m 26s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	2m 3s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	1m 11s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	1m 2s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	1m 1s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	1m 15s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	1m 3s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	55s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	1m 20s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	1m 0s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	59s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	52s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	1m 1s
Publish RTC release	-1s
docs	0s
	18m 57s

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