Added warning comment here.

app.py

@@ -260,7 +260,7 @@ def build_date(year, month, day):
 def len_validator(text):
     min_chars = 750  
     if len(text) < min_chars:
-        return f"Input length is {len(text)}. Please input a text that is greater than {min_chars} characters long. Recommended length {min_chars*2} characters." 
+        return f"Warning! Input length is {len(text)}. Please input a text that is greater than {min_chars} characters long. Recommended length {min_chars*2} characters." 
     else :
         return f"Input length satisified."