Update README.md

Changed Run on Gradient to load the Gradient Runtime Notebook Repo instead of the optimum-graphcore repo

README.md

@@ -56,4 +56,4 @@ You can try out Hugging Face Optimum on IPUs instantly using Paperspace Gradient
 
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-<a href="https://console.paperspace.com/github/huggingface/optimum-graphcore?machine=Free-IPU-POD16&container=graphcore%2Fpytorch-jupyter%3A2.6.0-ubuntu-20.04-20220804"><img src = "https://assets.paperspace.io/img/gradient-badge.svg"/></a> 
+<a href="https://console.paperspace.com/github/gradient-ai/Graphcore-HuggingFace?machine=Free-IPU-POD16&container=graphcore%2Fpytorch-jupyter%3A2.6.0-ubuntu-20.04-20220804&file=%2Fnotebook-tutorials%2Fintroduction_to_optimum_graphcore.ipynb"><img src = "https://assets.paperspace.io/img/gradient-badge.svg"/></a>