chore: also drop support for PyPy 3.8 #1678

Job	Run time
Build wheels on Linux (aarch64/manylinux)	0s
Build wheels on Linux (aarch64/musllinux)	0s
Build wheels on Linux (x86_64)	20m 55s
Build sdist and test extra dependencies	2m 44s
Build wheels on Linux (i686)	15m 29s
Build wheels on macOS (x86_64)	19m 41s
Build wheels for WebAssembly	6m 20s
Build wheels on macOS (arm64)	9m 20s
Build wheels on Windows (Win32)	11m 16s
Build with sanitizers for debugging purposes	4m 44s
Build wheels on Windows (x64)	27m 22s
	1h 57m 51s

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