Update NNX Module class docs in module.py

Author: 8bitmp3

flax/nnx/module.py

@@ -51,15 +51,15 @@ class ModuleMeta(ObjectMeta):
 class Module(Object, metaclass=ModuleMeta):
   """Base class for all neural network modules.
 
-  Layers and models should subclass this class.
+  Flax NNX layers and models should subclass this :class`flax.nnx.Module` class.
 
-  ``Module``'s can contain submodules, and in this way can be nested in a tree
-  structure. Submodules can be assigned as regular attributes inside the
-  ``__init__`` method.
+  An ``nnx.Module`` can contain sub-``Module``'s, allowing them to be nested in a
+  JAX pytree-like structure. Sub-``Module``'s can be assigned as regular attributes
+  inside the ``__init__`` method.
 
-  You can define arbitrary "forward pass" methods on your ``Module`` subclass.
+  You can define arbitrary "forward pass" methods on your ``nnx.Module`` subclass.
   While no methods are special-cased, ``__call__`` is a popular choice since
-  you can call the ``Module`` directly::
+  you can call the ``nnx.Module`` directly::
 
     >>> from flax import nnx
     >>> import jax.numpy as jnp