Show quickstart_jax.ipynb along with quickstart.ipynb on html documentation (#2394)

Signed-off-by: tdophung <tdophung@nvidia.com>

docs/getting_started.rst

+..
+    Copyright (c) 2022-2025, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+
+    See LICENSE for license information.
+
+Getting Started
+===============
+
+Choose your framework to get started with Transformer Engine:
+
+.. toctree::
+   :maxdepth: 1
+
+   PyTorch <examples/quickstart.ipynb>
+   JAX <examples/quickstart_jax.ipynb>
+

docs/index.rst

@@ -29,7 +29,7 @@ Transformer Engine documentation
    :caption: Getting Started
 
    installation
-   examples/quickstart.ipynb
+   getting_started
    faq
 
 .. toctree::