Update dependency livekit-client to v2.18.9 (#672) #1469

Job	Run time
Make RTC sdist	14s
Build RTC wheels (AMD64)	1m 14s
Build RTC wheels (aarch64)	1m 19s
Build RTC wheels (x86_64)	55s
Build RTC wheels (x86_64 arm64)	1m 4s
Generating protobuf	0s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	57s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	1m 19s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	1m 25s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	1m 21s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	1m 4s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	1m 50s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	59s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	1m 6s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	58s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	49s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	1m 2s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	1m 26s
Publish RTC release	0s
docs	0s
	19m 2s

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