message: Change the title to RC
diff: @@ -126,7 +126,7 @@ else:
  PRIVATE_MAP = {}
  DO_NOT_DESCEND_MAP = {}
  tf.__doc__ = """
  - ## TensorFlow 2.0 Beta
  + ## TensorFlow 2.0 RC
  Caution: This is a developer preview. You will likely find some bugs,
  performance issues, and more, and we encourage you to tell us about them.
  @@ -138,7 +138,7 @@ else:
  with:
  ```
  - pip install tensorflow==2.0.0-beta1
  + pip install tensorflow==2.0.0-rc0
  ```
  """
  