chore: update rust-sdks to livekit-ffi v0.12.68 #1599

Job	Run time
Build RTC wheels (x86_64)	50s
Make RTC sdist	18s
Generating protobuf	15s
Build RTC wheels (AMD64)	1m 37s
Build RTC wheels (x86_64 arm64)	1m 11s
Build RTC wheels (aarch64)	1m 12s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	1m 39s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	1m 49s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	2m 29s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	1m 48s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	1m 23s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	1m 26s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	2m 26s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	1m 23s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	2m 10s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	1m 54s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	1m 50s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	1m 51s
Publish RTC release	0s
docs	0s
	27m 31s

Provide feedback