fix: remove useless change

Author: nicolas-lambert-tc

meshroom/core/node.py

@@ -2068,7 +2068,7 @@ def attributeDescFromValue(attrName, value, isOutput):
                     groupDesc.append(eltDesc)
                 attrDesc = desc.GroupAttribute(groupDesc=groupDesc, **params)
             # Override empty default value with
-            attrDesc.value = value
+            attrDesc._value = value
             return attrDesc
         # Handle any other type of parameters as Strings
         return desc.StringParam(**params)