updated changelog

.github/CHANGELOG.md

@@ -537,14 +537,16 @@
   1: ──RY(1.35)──╰X──RY(0.422)──╰X──┤   
   ```
 
-- The embedding templates, as well as `BasicEntanglerLayers`, are now classes inheriting 
+- The embedding and state preparation templates, 
+  as well as `BasicEntanglerLayers`, are now classes inheriting 
   from `Operation`, and define the ansatz in their `expand()` method. This 
   change does not affect the user interface.
   [(#1138)](https://github.com/PennyLaneAI/pennylane/pull/1138)
   [(#1156)](https://github.com/PennyLaneAI/pennylane/pull/1156)
 
-  For convenience, `BasicEntanglerLayers` has a method that returns the shape of the 
-  trainable parameter tensor, i.e.,
+  For convenience, some templates now have a method that returns the expected 
+  shape of the trainable parameter tensor, which can be used to create 
+  random tensors.
 
   ```python
   shape = qml.templates.BasicEntanglerLayers.shape(n_layers=2, n_wires=4)