Update README.md - Latest News section (#554)

* Add H200 perf non-alpha image
Signed-off-by: Santosh Bhavani <santosh@semantic.md>

* Update README.rst - non-transparent H200 plot
Signed-off-by: Santosh Bhavani <santosh@semantic.md>

---------
Signed-off-by: Santosh Bhavani <santosh@semantic.md>

README.rst

@@ -16,7 +16,7 @@ Latest News
 
 * [12/2023] `New NVIDIA NeMo Framework Features and NVIDIA H200 <https://developer.nvidia.com/blog/new-nvidia-nemo-framework-features-and-nvidia-h200-supercharge-llm-training-performance-and-versatility/>`_
 
-.. image:: https://developer-blogs.nvidia.com/wp-content/uploads/2023/12/H200-NeMo-performance.png
+.. image:: docs/examples/H200-NeMo-performance.png
   :width: 600
   :alt: H200