Update nncf/torch/module_operations.py with docs

Co-authored-by: Daniil Lyakhov <daniil.lyakhov@intel.com>

nncf/torch/module_operations.py

@@ -53,6 +53,11 @@ def __init__(self, op):
 
 
 class UpdateParameterList(BaseOp):
+    """
+    A module which updates attributes of a module fed to 
+    forward method call by operand call.
+    """
+
     def __init__(self, param_names, op):
         super().__init__(op)
         self._param_names = param_names