docs: Updated landing page screenshot (#179)

Author: frgfm

docs/source/index.rst

@@ -5,7 +5,7 @@ TorchCAM: class activation explorer
 TorchCAM provides a minimal yet flexible way to explore the spatial importance of features on your PyTorch model outputs. Check out the live demo on `HuggingFace Spaces <https://huggingface.co/spaces/frgfm/torch-cam>`_ |:hugging_face:|
 
 
-.. image:: https://github.com/frgfm/torch-cam/releases/download/v0.1.2/base_snippet.png
+.. image:: https://github.com/frgfm/torch-cam/releases/download/v0.3.1/carbon.png
    :alt: code_snippet
    :align: center