fix: add admin_payment_settings.html to setup.py data_files

- Template was missing from PyPI package
- Caused TemplateNotFound error when accessing /dashboard/admin/payment-settings
- Added to templates/dashboard list in setup.py line 218

setup.py

@@ -215,6 +215,7 @@ setup(
             'templates/dashboard/delete_account.html',
             'templates/dashboard/admin_tiers.html',
             'templates/dashboard/admin_tier_form.html',
+            'templates/dashboard/admin_payment_settings.html',
             'templates/dashboard/pricing.html',
             'templates/dashboard/subscription.html',
             'templates/dashboard/billing.html',