requirements: update protobuf requirement from <3.20.4 to <4.23.5 #7910

Job	Run time
select-runner	1s
build (3.7, x64, ubuntu)	3m 25s
build (3.7, x64, windows)	3m 49s
build (3.11, x64, ubuntu)	4m 29s
build (3.11, x64, macos)	4m 12s
build (3.11, x64, windows)	5m 2s
build (3.9, macos, --cov=psyneulink)	3m 46s
build (3.9, ubuntu, --forked -m "not llvm")	5m 5s
build (3.8, x86, windows)	5m 38s
build (3.10, ubuntu, --fp-precision=fp32)	4m 5s
build (3.10, macos, -m benchmark --benchmark-enable --benchmark-only --benchmark-min-rounds=2 --b...	3m 58s
build (3.8, x64, macos)	4m 46s
	48m 16s

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