fix link

Author: nunomaduro

resources/www/index.html

@@ -60,7 +60,7 @@
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-                                    Course
+                                    YouTube
                                 </a>
                                 <a href="https://github.com/sponsors/nunomaduro" class="-mx-3 flex items-center gap-1.5 rounded-lg px-3 py-2 text-base/7 font-semibold text-white hover:bg-white/5">
                                     <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="size-5" fill="none">