fix: block page state

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/setting/sponsor_block_page.dart

@@ -67,11 +67,13 @@ class _SponsorBlockPageState extends State<SponsorBlockPage> {
       '$_blockServer/api/status/uptime',
     )
         .then((res) {
+      if (mounted) {
         setState(() {
           _serverStatus = res.statusCode == 200 &&
               res.data is String &&
               Utils.isStringNumeric(res.data);
         });
+      }
     });
   }