message: Fixed copy-and-paste error for instance_norm function
  Test Plan: Built docs locally; looks OK
  Reviewers: #tensorflow, #framework_ip_review_-_any_oss_or_third-party_code_use_has_been_approved, jamiep, georgep, hakons
  Subscribers: hakons, georgep
  Maniphest Tasks: T20488
diff: @@ -47,7 +47,7 @@ The original paper on instance normalisation is
  Dmitry Ulyanov, Andrea Vedaldi, Victor Lempitsky
  <https://arxiv.org/abs/1607.08022>`_.
  -See :py:func:`tensorflow.python.ipu.normalization_ops.group_norm`.
  +See :py:func:`tensorflow.python.ipu.normalization_ops.instance_norm`.
  Layer normalisation
  ~~~~~~~~~~~~~~~~~~~
  