Fix typo

Author: adam-cowley

asciidoc/courses/llm-chatbot-typescript/course.adoc

@@ -15,7 +15,7 @@
 :allow-llm-calls: true
 
 == Course Description
-at
+
 In this hands-on course, you will use the knowledge obtained from the link:/courses/llm-fundamentals[Neo4j & LLM Fundamentals course^] to create a Movie Recommendation Chatbot backed by a Neo4j database.
 
 You will take a simple chat interface that repeats the user's input and modify it to answer questions about movies via the Neo4j Recommendations Dataset using GPT-4, complete with conversation history.