Update conferences

Author: oleksis

_data/conferences.yml

@@ -1,3 +1,11 @@
+- dates: 22 - 25 Sep 2024
+  location: Durham, North Caroline, United States
+  name: DjangoCon US 2024
+  speaking: _No response_
+  summary: DjangoCon US 2024 has been announced! Join us for five days of inspiration,
+    education, and networking opportunities centering around the Django web framework.
+  type: both
+  url: 2024.djangocon.us/
 - dates: 16 - 25 May 2024
   location: Pittsburgh, Pennsylvania, United States
   name: PyCon US 2024