Update cudf.pandas docs for GA (#15744)

cudf.pandas is now generally available (see the [RAPIDS 24.04 release blog](https://medium.com/rapids-ai/rapids-24-04-release-c11cf44c3e23#f263) for more information).

This PR updates the docs accordingly.

Authors:
  - Nick Becker (https://github.com/beckernick)
  - GALI PREM SAGAR (https://github.com/galipremsagar)

Approvers:
  - GALI PREM SAGAR (https://github.com/galipremsagar)

URL: #15744

docs/cudf/source/cudf_pandas/index.rst

@@ -34,10 +34,8 @@ automatically **falling back to pandas** for other operations.
 | Nothing changes, not even your `import` statements, when going from CPU to GPU.             | Combines the full flexibility of Pandas with blazing fast performance of cuDF                                       |
 +---------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------------+
 
-Starting with the version 23.10.01 release ``cudf.pandas`` is
-available in Open Beta, as part of the ``cudf`` package .  See `RAPIDS
-Quick Start <https://rapids.ai/#quick-start>`_ to get up-and-running
-with ``cudf``.
+``cudf.pandas`` is now Generally Available (GA) as part of the ``cudf`` package.  See `RAPIDS
+Quick Start <https://rapids.ai/#quick-start>`_ to get up-and-running with ``cudf``.
 
 .. toctree::
    :maxdepth: 1