set safety analysis ml to ml3

Author: masc2023

process/index.rst

@@ -155,7 +155,7 @@ Development
       Verify that work products fulfil their specified requirements.
 
    .. grid-item-card::
-      :class-card: card-ml2
+      :class-card: card-ml3
 
       :ref:`Safety Analysis <safety_analysis>`
       ^^^