Update jupyter-html livekit deps to v2.19.0 #1545

Job	Run time
Make RTC sdist	16s
Build RTC wheels (AMD64)	1m 20s
Build RTC wheels (aarch64)	1m 44s
Build RTC wheels (x86_64)	1m 7s
Build RTC wheels (x86_64 arm64)	1m 13s
Generating protobuf	29s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	1m 37s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	2m 4s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	1m 54s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	1m 35s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	2m 36s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	1m 44s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	1m 36s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	2m 1s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	2m 28s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	1m 32s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	1m 50s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	2m 25s
docs	0s
Publish RTC release	0s
	29m 31s

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