bump FFI to v0.12.67 #1575

Job	Run time
Make RTC sdist	15s
Build RTC wheels (AMD64)	2m 22s
Build RTC wheels (aarch64)	1m 22s
Build RTC wheels (x86_64)	51s
Generating protobuf	33s
Build RTC wheels (x86_64 arm64)	1m 17s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	17s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	1m 29s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	49s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	24s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	1m 27s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	20s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	21s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	26s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	17s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	18s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	28s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	44s
Publish RTC release	0s
docs	0s
	14m 0s

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