Log Message:
py-django: updated to 5.1.6

Django 5.1.6 fixes several bugs in 5.1.5.

Bugfixes

Fixed a regression in Django 5.1.5 that caused validate_ipv6_address() and \ 
validate_ipv46_address() to crash when handling non-string values

Fixed a regression in Django 5.1 where password fields, despite being set to \ 
required=False, were still treated as required in forms derived from \ 
BaseUserCreationForm