MAINT: Remove Xarray upper pin (#2601) #2526

Job	Run time
GHA Security Analysis using Zizmor	20s
should run ci	13s
cache-pixi-lock	1m 2s
TypeChecking: pixi run typing	1m 14s
build-and-upload-nightly-parcels	2m 38s
Unit tests: windows \| pixi run -e test tests	6m 32s
Unit tests: ubuntu \| pixi run -e test-py311 tests	4m 31s
Unit tests: ubuntu \| pixi run -e test-minimum tests	4m 29s
Unit tests: ubuntu \| pixi run -e test-py313 tests	4m 31s
Unit tests: ubuntu \| pixi run -e test tests	4m 29s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	-1s
merge-test-artifacts	1s
	29m 59s

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