Update whats_new.rst

Author: rsmontero

source/intro_release_notes/release_notes/whats_new.rst

@@ -61,4 +61,4 @@ Additionally, the following functionalities are present that were not in OpenNeb
 Other Issues Solved
 ================================================================================
 
-- `Added check for password's upper limit <https://github.com/OpenNebula/one/issues/6892>`__.
+- `Limit password size for each authentication driver to prevent DoS attacks <https://github.com/OpenNebula/one/issues/6892>`__.