Update FFI to 0.12.47 #1236

Job	Run time
Make RTC sdist	15s
Build RTC wheels (AMD64)	1m 56s
Build RTC wheels (x86_64 arm64)	40s
Build RTC wheels (aarch64)	3m 2s
Build RTC wheels (x86_64)	36s
Generating protobuf	18s
Test (${{ matrix.os }}, Python ${{ matrix.python-version }})	0s
Publish RTC release	0s
docs	0s
Make RTC sdist	17s
Build RTC wheels (AMD64)	1m 9s
Build RTC wheels (x86_64 arm64)	1m 10s
Build RTC wheels (aarch64)	1m 32s
Build RTC wheels (x86_64)	46s
Generating protobuf	15s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	51s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	34s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	38s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	44s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	1m 15s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	29s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	1m 3s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	1m 36s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	33s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	39s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	1m 4s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	37s
Publish RTC release	0s
docs	0s
	21m 59s

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