strip / from index url when set from usetting

Signed-off-by: anasty17 <e.anastayyar@gmail.com>

Author: anasty17

bot/modules/users_settings.py

@@ -404,6 +404,8 @@ async def set_option(_, message, option):
         for x in fx:
             x = x.lstrip(".")
             value.append(x.strip().lower())
+    elif option == "INDEX_URL":
+        value = value.strip("/")
     elif option in ["UPLOAD_PATHS", "FFMPEG_CMDS", "YT_DLP_OPTIONS"]:
         if value.startswith("{") and value.endswith("}"):
             try: