numpy: bump to 2.4.3

numpy: bump to 2.4.3

Changelog since 2.4.2:
- Fix threading issue with OpenBLAS on ARM
- Fix memory leaks found via LeakSanitizer
- Fix buffer overrun in CPU baseline validation
- Fix NULL pointer dereference and reference leaks
- Fix np.ma.flatten_structured_array infinite recursion
- Fix np.isin() weak hash function
- Fix busdaycalendar bool array weekmask handling

Full changelog:
https://github.com/numpy/numpy/releases/tag/v2.4.3

Signed-off-by: Alexandru Ardelean <redacted>