Fixed typo. Dont start not valid workers

wallamanta/wallamanta.py

@@ -439,10 +439,11 @@ def main()->None:
     products = walladb.get_all_products()
 
     for product in products:
-        logging.info(product)
-        p = threading.Thread(target=Worker.run, args=(product, ))
-        p.start()
-        SEARCH_THREADS_LIST.append((product, p))
+        if helpers.is_valid_request(product):
+            logging.info(product)
+            p = threading.Thread(target=Worker.run, args=(product, ))
+            p.start()
+            SEARCH_THREADS_LIST.append((product, p))
 
     """Start the bot."""
     # Create the Application and pass it your bot's token.