Fix convert.fesom_to_ugrid dimension renaming #2478

Job	Run time
should run ci	9s
GHA Security Analysis using Zizmor	4m 13s
cache-pixi-lock	10s
TypeChecking: pixi run typing	1m 28s
Unit tests: ubuntu \| pixi run -e test-py313 tests	8m 56s
build-and-upload-nightly-parcels	2m 30s
Unit tests: windows \| pixi run -e test tests	18m 12s
Unit tests: ubuntu \| pixi run -e test-minimum tests	11m 14s
Unit tests: ubuntu \| pixi run -e test-py311 tests	21m 53s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	-1s
Unit tests: ubuntu \| pixi run -e test tests	6m 33s
merge-test-artifacts	0s
	1h 15m 17s

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