Bump rich from 13.5.3 to 13.6.0 in /.github/requirements #688

Job	Run time
sdists	1m 6s
3.11 ABI cp37 macOS -arch x86_64 -arch arm64	2m 46s
3.11 ABI cp37 macOS -arch x86_64	2m 14s
3.11 win32 cp37	4m 0s
pypy-3.9 ABI macOS -arch x86_64	1m 45s
3.11 win64 cp37	5m 20s
cp311-cp311 for manylinux2014_x86_64	2m 25s
pypy-3.10 ABI macOS -arch x86_64	1m 43s
pypy-3.9 win64	4m 42s
cp311-cp311 for manylinux_2_28_x86_64	2m 19s
pypy-3.10 win64	5m 8s
cp311-cp311 for musllinux_1_1_x86_64	3m 58s
cp311-cp311 for musllinux_1_2_x86_64	3m 21s
cp311-cp311 for manylinux2014_aarch64	4m 11s
cp311-cp311 for manylinux_2_28_aarch64	4m 0s
cp311-cp311 for musllinux_1_1_aarch64	3m 40s
cp311-cp311 for musllinux_1_2_aarch64	3m 34s
pp39-pypy39_pp73 for manylinux_2_28_x86_64	3m 4s
pp39-pypy39_pp73 for manylinux_2_28_aarch64	4m 3s
pp310-pypy310_pp73 for manylinux_2_28_x86_64	2m 33s
pp310-pypy310_pp73 for manylinux_2_28_aarch64	4m 14s
	1h 10m 6s

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