NH-3399 Log as possible breaking change

Author: hazzik

releasenotes.txt

@@ -26,6 +26,7 @@ Build vNext
         * Oracle: The atan2 and power functions now return double (instead of single) for consistency with other dialects.
         * Removed FirebirdDriver. It was the same as FirebirdClientDriver since 3.2, and the latter have been the default since then.
         * Removed bunch of unused methods on *Helper classes
+        * Static fields on NHibernateUtil are declared as their exact class
 
 Build 3.3.3.GA
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