requirements: update pandas requirement from <2.1.5 to <2.2.1 #8475

Job	Run time
select-runner	1s
build (3.7, x64, ubuntu)	1h 1m 25s
build (3.7, x64, windows)	1h 8m 8s
build (3.11, x64, ubuntu)	1h 31m 31s
build (3.11, x64, macos)	1h 1m 40s
build (3.11, x64, windows)	1h 38m 44s
build (3.9, macos, --cov=psyneulink)	1h 2m 25s
build (3.9, ubuntu, --forked -m "not llvm")	39m 39s
build (3.8, x86, windows)	1h 48m 14s
build (3.10, ubuntu, --fp-precision=fp32)	1h 28m 10s
build (3.10, macos, -m benchmark --benchmark-enable --benchmark-only --benchmark-min-rounds=2 --b...	51m 58s
build (3.7, x64, ubuntu, min)	1h 3m 56s
build (3.8, x64, macos)	49m 32s
	14h 5m 23s

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