Update README.md

Author: IvanKiral

README.md

@@ -1,3 +1,7 @@
+> [!IMPORTANT]
+> This sample app relies on the Dancing Goat project, which is no longer available for creation in Kontent.ai.
+>
+> If you still wish to use this project, you can import the Dancing Goat project using the [Data Ops](https://github.com/kontent-ai/data-ops) tool by following the instructions provided in our [Dancing Goat repository](https://github.com/kontent-ai-bot/dancing-goat).
 # Kontent.ai sample React single-page application
 
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