CI: temporarily drop numpy to under 2 in pypi builds #98

Job	Run time
standard / Documentation / Python 3.9: documentation building	1m 16s
standard / pre-commit checks / pre-commit	13s
standard / Conda (3.10) / Python 3.10: conda	4m 9s
standard / Conda (3.11, true) / Python 3.11: conda	3m 40s
standard / Conda (3.12, true) / Python 3.12: conda	5m 34s
standard / Conda (3.9, true) / Python 3.9: conda	4m 19s
standard / Pip (3.10) / Python 3.10: pip	2m 21s
standard / Pip (3.11, true) / Python 3.11: pip	2m 12s
standard / Pip (3.12, true) / Python 3.12: pip	2m 32s
standard / Pip (3.9, true) / Python 3.9: pip	2m 26s
standard / Documentation / Documentation deployment	0s
	28m 42s

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