Clean CHANGELOG

CHANGELOG.rst

@@ -26,7 +26,7 @@ Changelog
    - :func:`ndonnx.tril`
    - :func:`ndonnx.triu`
    - :func:`ndonnx.linspace`
-- Custom data types can now provide implementations for :func:`ndonnx.where`.
+   - :func:`ndonnx.where`
 - The :class:`ndonnx._experimental.UniformShapeOperations` now provides implementations of shape operations that are generic across all data types where each constituent field has the same shape (that of the overall array).
 
 **Other changes**