docs: update not working endpoint (#114)

Author: OutdatedGuy

README.md

@@ -306,7 +306,6 @@ approved!)_:
 | https://randomuser.me/api/?inc=gender      | CORS enabled, no-cache                          |
 | https://dog.ceo/api/breed/husky/list       | CORS enabled, no-cache                          |
 | https://lenta.ru                           | Russia supported, CORS enabled, no-cache        |
-| https://www.gazeta.ru                      | Russia supported, CORS enabled, no-cache        |
 
 _Feel free to use your own trusted endpoints! We don't judge your API choices._
 🎯

example/lib/pages/custom_uris.dart

@@ -23,6 +23,9 @@ class _CustomURIsState extends State<CustomURIs> {
     super.initState();
     _subscription = InternetConnection.createInstance(
       customCheckOptions: [
+        InternetCheckOption(
+          uri: Uri.parse('https://cloudflare.com/cdn-cgi/trace'),
+        ),
         InternetCheckOption(uri: Uri.parse('https://ipapi.co/ip')),
         InternetCheckOption(
           uri: Uri.parse('https://api.adviceslip.com/advice'),
@@ -40,7 +43,6 @@ class _CustomURIsState extends State<CustomURIs> {
           uri: Uri.parse('https://dog.ceo/api/breed/husky/list'),
         ),
         InternetCheckOption(uri: Uri.parse('https://lenta.ru')),
-        InternetCheckOption(uri: Uri.parse('https://www.gazeta.ru')),
       ],
       useDefaultOptions: false,
     ).onStatusChange.listen((status) {