docs: update README.md (#39)

* Update README.md

fixes broken github.io link

* docs: fix url

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Co-authored-by: Yohan Lasorsa <[email protected]>

Author: brucedkyle

trainer/README.md

@@ -6,7 +6,7 @@ It also contains a proxy that you can use to share your Azure OpenAI instance wi
 
 ## Content
 
-- The introduction slides are in the `docs/slides` folder, and available at https://azure-samples.github.io/azure-openai-rag-workshop-java/
+- The introduction slides are in the `docs/slides` folder, and available at https://azure-samples.github.io/azure-openai-rag-workshop/
 - The workshop is in the `docs/workshop` folder, and available at https://aka.ms/ws/openai-rag
 
 ## Preparation