Typo

app.py

@@ -181,7 +181,7 @@ def app_main(app_mode,example_files,model_name_files):
 
         step1_line = "Step 1. Upload text file(one sentence in a line) or choose an example text file below"
         if (app_mode ==  DOC_RETRIEVAL):
-            step1_line += ". The line need is treated as the query"
+            step1_line += ". The first line is treated as the query"
         uploaded_file = st.file_uploader(step1_line, type=".txt")
 
         selected_file_index = st.selectbox(label=f'Example files ({len(example_file_names)})',