Update logo from OceanParcels to Parcels in documentation #1609

Job	Run time
cache-pixi-lock / Generate output	1m 0s
Unit tests: ubuntu \| pixi run -e test-minimum tests	2m 22s
Unit tests: ubuntu \| pixi run -e test-latest tests	3m 54s
Unit tests: ubuntu \| pixi run -e test-py311 tests	2m 25s
Integration: ${{ matrix.os }} \| pixi run -e ${{ matrix.pixi-environment }} tests-notebooks	-1s
TypeChecking: pixi run typing	-1s
merge-test-artifacts	0s
	9m 39s

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