refactor bounce

Signed-off-by: ale <ale@manalejandro.com>

src/App.js

@@ -99,7 +99,7 @@ const App = () => {
           setBounce(data => data + json.media.track[0][key])
         }
       })
-    } else if (!json?.media && bounce.search('Now Playing: null') === -1) {
+    } else if (!json?.media && bounce.search('Now Playing: Title not available') === -1) {
       setLink('')
       setTitle('Stream Radio')
       setBounce('Now Playing: Title not available')