Update README.md

Author: softchris

README.md

@@ -32,7 +32,7 @@ Visit [https://aka.ms/genai-js-course](https://aka.ms/genai-js-course) to get st
 
 - Lessons covering everything from basics to RAG.
 - Interact with historical characters using GenAI and our companion app.
-- Fun and engaging narrative, you'll be time travelling!
+- Fun and engaging narrative, you'll be time traveling!
 
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   <img src="./images/character.png" width="600px" />