astro/astrometry: Update to 0.96

Several enhancements and fixes, for example:

• Changes and fixes for NumPy2
• Process-submissions: don't fail on empty db and more logging
• Nova: Additions and switch to index-5200-HEAVY
• API key not always required

Changelog: https://github.com/dstndstn/astrometry.net/compare/0.95...0.96

Reported by: Repology