Add Federal district (DF) to state dropdown for Brazil (BR) (#4966)

src/pretix/base/settings.py

@@ -3705,7 +3705,7 @@ COUNTRIES_WITH_STATE_IN_ADDRESS = {
     # are actually *used* in postal addresses. This is obviously not complete and opinionated.
     # Country: [(List of subdivision types as defined by pycountry), (short or long form to be used)]
     'AU': (['State', 'Territory'], 'short'),
-    'BR': (['State'], 'short'),
+    'BR': (['Federal district', 'State'], 'short'),
     'CA': (['Province', 'Territory'], 'short'),
     # 'CN': (['Province', 'Autonomous region', 'Munincipality'], 'long'),
     'JP': (['Prefecture'], 'long'),