Added a thank you note to the changelog regarding #124

Author: pelme

docs/changelog.rst

@@ -6,7 +6,8 @@ NEXT
 
 * Fix interaction between ``db`` and ``transaction_db`` fixtures (#126).
 
-* Fix admin client with custom user models (#124).
+* Fix admin client with custom user models (#124). Big thanks to Benjamin
+  Hedrich and Dmitry Dygalo for patch and tests.
 
 2.6.2
 -----