fix a bug introduced in a breaking change of pypowsybl 1.10.0 #531

Job	Run time
Build windows cp37 wheel for x64	7m 39s
Build linux cp37 wheel on manylinux_2_28_x86_64	3m 23s
Build windows cp38 wheel for x64	5m 59s
Build macos-14 cp38 wheel with cibuildwheel	4m 56s
Build linux cp38 wheel on manylinux_2_28_x86_64	3m 22s
Build windows cp39 wheel for x64	5m 31s
Build darwin cp37 wheel on x86_64	5m 13s
Build macos-14 cp39 wheel with cibuildwheel	2m 17s
Build linux cp39 wheel on manylinux_2_28_x86_64	3m 31s
Build windows cp310 wheel for x64	5m 0s
Build darwin cp38 wheel on x86_64	3m 29s
Build windows-2019 cp39 wheel with cibuildwheel	4m 39s
Build windows cp311 wheel for x64	7m 57s
Build linux cp310 wheel on manylinux_2_28_x86_64	3m 41s
Build darwin cp39 wheel on x86_64	7m 31s
Build windows-2019 cp310 wheel with cibuildwheel	5m 10s
Build windows cp312 wheel for x64	5m 45s
Build linux cp311 wheel on manylinux_2_28_x86_64	3m 48s
Build darwin cp310 wheel on x86_64	5m 36s
Build windows-2019 cp311 wheel with cibuildwheel	4m 58s
Build windows cp313 wheel for x64	4m 40s
Build linux cp312 wheel on manylinux_2_28_x86_64	3m 56s
Build darwin cp310 wheel on arm64	4m 15s
Build windows-2019 cp312 wheel with cibuildwheel	5m 40s
Build linux cp313 wheel on manylinux_2_28_x86_64	3m 3s
Build darwin cp311 wheel on x86_64	5m 36s
Build windows-2019 cp313 wheel with cibuildwheel	4m 57s
Build darwin cp311 wheel on arm64	2m 56s
Build darwin cp312 wheel on x86_64	7m 15s
Build darwin cp312 wheel on arm64	2m 52s
Build darwin cp313 wheel on x86_64	5m 4s
Build darwin cp313 wheel on arm64	2m 56s
Package wheels	4s
	2h 32m 39s

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