fixing typo :(

app.py

@@ -78,7 +78,7 @@ def ask_question(question):
     return results
 
 if question:
-    with st.spinner("👑    Performing sematic search on royal scripts..."):
+    with st.spinner("👑    Performing semantic search on royal scripts..."):
         try:
             msg = 'Asked ' + question
             logging.info(msg)