bump FFI to v0.12.67 #1579

Job	Run time
Generating protobuf	16s
Build RTC wheels (x86_64 arm64)	1m 5s
Make RTC sdist	12s
Build RTC wheels (x86_64)	51s
Build RTC wheels (aarch64)	1m 9s
Build RTC wheels (AMD64)	1m 10s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	2m 27s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	1m 38s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	1m 33s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	1m 29s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	1m 35s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	1m 49s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	2m 46s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	1m 49s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	1m 38s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	3m 18s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	1m 54s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	1m 29s
docs	0s
Publish RTC release	-1s
	28m 7s

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