Update dependency livekit-client to v2.18.9 - autoclosed #1364

Job	Run time
Generating protobuf	23s
Make RTC sdist	13s
Build RTC wheels (x86_64 arm64)	1m 3s
Build RTC wheels (AMD64)	1m 14s
Build RTC wheels (x86_64)	2m 7s
Build RTC wheels (aarch64)	1m 22s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	30s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	45s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	41s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	40s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	38s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	29s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	1m 15s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	52s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	55s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	38s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	1m 32s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	53s
Publish RTC release	-1s
docs	0s
	16m 9s

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