message: Update RELEADE.md to capture the breaking change of `tf.image.extract_glimpse`
diff: +# Release 2.3.0
  +
  +## Breaking Changes
  +* `tf.image.extract_glimpse` has been updated to correctly process the case where `centered=False` and `normalized=False`. This is a breaking change as the output is different from (incorrect) previous versions. Note this breaking change only impacts `tf.image.extract_glimpse` and `tf.compat.v2.image.extract_glimpse` API endpoints. The behavior of `tf.compat.v1.image.extract_glimpse` does not change. The behavior of exsiting C++ kernel `ExtractGlimpse` does not change as well, so saved models will not be impacted.
  +
  # Release 2.2.0
  TensorFlow 2.2 discontinues support for Python 2, [previously announced](https://groups.google.com/a/tensorflow.org/d/msg/announce/gVwS5RC8mds/dCt1ka2XAAAJ) as following [Python 2's EOL on January 1, 2020](https://www.python.org/dev/peps/pep-0373/#update).
  