0.25.0

• Add Django 6.1 support.
• Drop Django < 4.2 support. #220
• Refactor update_tree to use bulk updates. (by stumpylog in #221)
• Update only changed fields in update_tree bulk update.
• Replace mark_safe(f-string) with format_html to prevent XSS in admin. #219
• Pin actions to SHA, fix permissions, add "OpenSSF Scorecard" workflow. #218
• Bump test requirements.
• Bump pre-commit hooks.