requirements: update sphinxcontrib-htmlhelp requirement from <2.0.5 to <2.1.1 #9201

Job	Run time
build (3.7, x64, ubuntu)	53m 53s
build (3.7, x64, windows)	47m 19s
build (3.11, x64, ubuntu)	1h 15m 15s
build (3.11, x64, macos)	21m 47s
build (3.11, x64, windows)	1h 15m 10s
build (3.12, x64, ubuntu)	1h 13m 6s
build (3.12, x64, macos)	24m 0s
build (3.12, x64, windows)	1h 13m 38s
build (3.9, macos, --cov=psyneulink)	36m 42s
build (3.9, ubuntu, --forked -m "not llvm")	31m 20s
build (3.8, x86, windows)	1h 20m 43s
build (3.10, ubuntu, --fp-precision=fp32)	1h 15m 4s
build (3.10, macos, -m benchmark --benchmark-enable --benchmark-only --benchmark-min-rounds=2 --b...	24m 8s
build (3.7, x64, ubuntu, min)	48m 34s
build (3.8, macos)	26m 37s
	12h 47m 16s

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