Fix ArrayXD YAML conversion #3708

Job	Run time
check_code_quality	20s
test_py310 (unit, ubuntu-latest, deps-latest)	6m 33s
test (unit, ubuntu-latest, deps-latest)	7m 52s
test_py310 (unit, windows-latest, deps-latest)	11m 41s
test (unit, ubuntu-latest, deps-minimum)	7m 33s
test (unit, windows-latest, deps-latest)	15m 21s
test (unit, windows-latest, deps-minimum)	15m 39s
test (integration, ubuntu-latest, deps-latest)	6m 10s
test (integration, ubuntu-latest, deps-minimum)	5m 55s
test (integration, windows-latest, deps-latest)	14m 43s
test (integration, windows-latest, deps-minimum)	12m 32s
	1h 44m 19s

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