Add pydata berlin 2025 conference (#68)

* add pydata berlin conference

* add timezone to pydata berlin conference

Author: theopinard

_data/conferences.yml

@@ -90,6 +90,22 @@
     latitude: 53.4794892
     longitude: -2.2451148
 
+- conference: PyData Berlin
+  year: 2025
+  link: https://pydata.org/berlin2025/
+  cfp_link: https://cfp.pydata.org/berlin2025/cfp
+  cfp: '2025-05-04 23:59:59'
+  timezone: Europe/Berlin
+  place: Berlin, Germany
+  start: 2025-09-01
+  end: 2025-09-03
+  sub: DATA
+  twitter: pydataberlin
+  location:
+  - title: PyData Berlin 2025
+    latitude: 52.520778408127605
+    longitude: 13.416401868537298
+
 - conference: PyCamp España
   year: 2025
   link: https://pycamp.es/