Update app.py

app.py

@@ -123,7 +123,7 @@ The uploaded PDF file data will disappear when you close the browser tab.:toilet
 
 Only PDF files can be uploaded.
 
-This translation app is useful for people who want to translate something or want to read something but cannot read it unless it is translated, and who want to quickly check the original text and the translation by comparing them in pairs.
+This translation app is useful for people who want to translate something or want to read something but cannot read it unless it is translated, and who want to quickly check the original text and the translation by comparing them in pairs. :yin_yang:
 
 Even if the PDF file has many pages, there is no limit to the number of pages or characters.