release 3.25: docs

Author: aboudreault

docs.yaml

@@ -22,6 +22,8 @@ sections:
       # build extensions like libev
       CASS_DRIVER_NO_CYTHON=1 python setup.py build_ext --inplace --force
 versions:
+  - name: '3.25'
+    ref: a83c36a5
   - name: '3.24'
     ref: 21cac12b
   - name: '3.23'