Build RTC #1210

Job	Run time
Make RTC sdist	15s
Build RTC wheels (aarch64)	1m 7s
Build RTC wheels (AMD64)	1m 13s
Build RTC wheels (x86_64 arm64)	44s
Build RTC wheels (x86_64)	41s
Generating protobuf	0s
Test (${{ matrix.os }}, Python ${{ matrix.python-version }})	0s
Publish RTC release	0s
docs	0s
	4m 0s

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