Update app.py

app.py

@@ -40,7 +40,7 @@ article = """
             Notes:
             - Click submit/enviar button to obtain the UCS prediction
             - Click clear/limpiar button to refresh text
-            - Please note the application ranges of the variables in the above-referenced paper (in publishing process). Outside these ranges, the predictions may not be reliable
+            - Please note the application ranges of the variables in the above-referenced paper (https://doi.org/10.1016/j.jrmge.2023.03.008). Outside these ranges, the predictions may not be reliable
             - As a decimal separator you can use either a point or a comma
            """