fixup! Release 5.2

Missing period

Author: fredericDelaporte

releasenotes.txt

@@ -25,7 +25,7 @@ Release notes - NHibernate - Version 5.2.0
           Previously it was ignoring parameters. This type may change its behavior
           for any mapping having defined parameters for this type. See #1833.
         * Querying a dynamic entity as a Hashtable instead of an IDictionary is no more
-          supported
+          supported.
         * Mapping a dynamic component with a Hashtable property instead of an
           IDictionary is no more supported.
         * Dialect.GetIdentitySelectString was called by the entity persisters with