Update changelog

Author: RKrahl

CHANGES.rst

@@ -11,8 +11,14 @@ Bug fixes and minor changes
 + `#152`_: Fix a documentation error
 + `#154`_: Fix a duplicate test name
 
+Misc
+----
+
++ `#157`_: :mod:`icat.ingest` now considered stable.
+
 .. _#152: https://github.com/icatproject/python-icat/pull/152
 .. _#154: https://github.com/icatproject/python-icat/pull/154
+.. _#157: https://github.com/icatproject/python-icat/pull/157
 
 
 .. _changes-1_3_0: