Update conferences.yml

Author: JesperDramsch

_data/conferences.yml

@@ -141,7 +141,8 @@
   year: 2025
   link: https://2025.pythonbrasil.org.br/
   cfp_link: https://talks.python.org.br/pythonbrasil-2025/cfp
-  cfp: '2025-04-27 23:59:00'
+  cfp: '2025-04-13 23:59:00'
+  cfp_ext: '2025-04-27 23:59:00'
   timezone: America/Sao_Paulo
   place: Sao Paulo, Brazil
   start: 2025-10-21