Event settings: Workaround for Django 5.2 change (#6025)

src/pretix/control/forms/event.py

@@ -34,6 +34,7 @@
 # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations under the License.
 
+from dataclasses import dataclass
 from decimal import Decimal
 from urllib.parse import urlencode
 from zoneinfo import ZoneInfo
@@ -578,6 +579,12 @@ class EventSettingsValidationMixin:
                 del self.cleaned_data[field]
 
 
+@dataclass
+class FontOption:
+    title: str
+    data: str
+
+
 class EventSettingsForm(EventSettingsValidationMixin, FormPlaceholderMixin, SettingsForm):
     timezone = forms.ChoiceField(
         choices=((a, a) for a in common_timezones),
@@ -729,7 +736,7 @@ class EventSettingsForm(EventSettingsValidationMixin, FormPlaceholderMixin, Sett
             del self.fields['event_list_filters']
             del self.fields['event_calendar_future_only']
         self.fields['primary_font'].choices = [('Open Sans', 'Open Sans')] + sorted([
-            (a, {"title": a, "data": v}) for a, v in get_fonts(self.event, pdf_support_required=False).items()
+            (a, FontOption(title=a, data=v)) for a, v in get_fonts(self.event, pdf_support_required=False).items()
         ], key=lambda a: a[0])
 
         # create "virtual" fields for better UX when editing <name>_asked and <name>_required fields