MAINT: Set Pixi relative exclude-newer #2456

Job	Run time
should run ci	10s
cache-pixi-lock	1m 21s
Unit tests: ubuntu \| pixi run -e test-minimum tests	4m 47s
TypeChecking: pixi run typing	1m 20s
Unit tests: windows \| pixi run -e test tests	10m 50s
Unit tests: ubuntu \| pixi run -e test tests	3m 53s
build-and-upload-nightly-parcels	2m 25s
Unit tests: ubuntu \| pixi run -e test-py311 tests	5m 7s
Unit tests: ubuntu \| pixi run -e test-py313 tests	4m 54s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	-2s
merge-test-artifacts	-1s
	34m 44s

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