Update NGC version to 25.08 (#2085)

update NGC version
Signed-off-by: Phuong Nguyen <phuonguyen@nvidia.com>

README.rst

@@ -176,15 +176,15 @@ For example to use the NGC PyTorch container interactively,
 
 .. code-block:: bash
 
-    docker run --gpus all -it --rm nvcr.io/nvidia/pytorch:25.04-py3
+    docker run --gpus all -it --rm nvcr.io/nvidia/pytorch:25.08-py3
 
 For example to use the NGC JAX container interactively,
 
 .. code-block:: bash
 
-    docker run --gpus all -it --rm nvcr.io/nvidia/jax:25.04-py3
+    docker run --gpus all -it --rm nvcr.io/nvidia/jax:25.08-py3
 
-Where 25.04 (corresponding to April 2025 release) is the container version.
+Where 25.08 (corresponding to August 2025 release) is the container version.
 
 **Benefits of using NGC containers:**