Update app.py

app.py

@@ -75,7 +75,7 @@ def main():
 
     st.header("Wise Chat Labs - Your Ultimate Chatbot")
 
-    st.subheader("Upload a document")
+    st.subheader("Upload document")
     st.file_uploader(
         "Upload document",
         type=["pdf"],
@@ -93,4 +93,4 @@ def main():
 
 
 if __name__ == "__main__":
-    main()
+    main()