requirements: update matplotlib requirement (#3221) #10196

Job	Run time
build (3.8, x64, ubuntu)	1h 32m 13s
build (3.8, x64, windows)	1h 33m 20s
build (3.11, x64, ubuntu)	1h 16m 52s
build (3.11, x64, macos)	35m 15s
build (3.11, x64, windows)	1h 34m 28s
build (3.12, x64, ubuntu)	1h 17m 53s
build (3.12, x64, macos)	38m 27s
build (3.12, x64, windows)	1h 32m 55s
build (3.9, macos, --cov=psyneulink)	48m 13s
build (3.9, ubuntu, --forked -m "not llvm")	38m 46s
build (3.9, x86, windows)	1h 38m 27s
build (3.10, ubuntu, --fp-precision=fp32)	1h 19m 58s
build (3.10, macos, -m benchmark --benchmark-enable --benchmark-only --benchmark-min-rounds=2 --b...	26m 53s
build (3.8, macos, min)	37m 7s
	15h 30m 47s

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