Update pixi lockfile and pin dependencies #254

Job	Run time
prechecks / pre-commit	15s
all-prechecks	1s
pixi / Test with pixi (macos-latest)	11s
unit-tests / Test and package on 3.8	2m 2s
pixi / Test with pixi (ubuntu-latest)	7s
unit-tests / Test and package on 3.9	1m 55s
unit-tests / Test and package on 3.10	2m 4s
unit-tests / Test and package on 3.11	1m 55s
unit-tests / Test and package on 3.12	2m 0s
unit-tests / Check wheel installation of 3.8	16s
unit-tests / Check wheel installation of 3.9	11s
unit-tests / Check wheel installation of 3.10	14s
unit-tests / Check wheel installation of 3.11	15s
unit-tests / Check wheel installation of 3.12	16s
unit-tests / Check source installation of 3.8	22s
unit-tests / Check source installation of 3.9	17s
unit-tests / Check source installation of 3.10	16s
unit-tests / Check source installation of 3.11	14s
unit-tests / Check source installation of 3.12	15s
publish	0s
all	0s
	13m 6s

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