minor bool error

app.py

@@ -33,7 +33,7 @@ def fetch_text(url):
     return validate_url(full_url)
 @spaces.GPU
 def synthesize(article_url,progress_audio=gr.Progress()):
-    if not article_url.startswith("http://") and article_url.startswith("https://"):
+    if not article_url.startswith("http://") and not article_url.startswith("https://"):
         return "URL must start with 'http://' or 'https://'",None
 
     text = fetch_text(article_url)