fix schedule floating nav bar

Author: djoufson

src/app/Components/Pages/NET.Conf/Year2025/Components/ScheduleSection.razor

@@ -1,7 +1,7 @@
 @using Microsoft.Extensions.Localization
 @inject Microsoft.Extensions.Localization.IStringLocalizerFactory LocalizerFactory
 
-<section id="schedule" class="bg-gray-50 py-16">
+<section id="schedule" data-section-id="schedule" class="bg-gray-50 py-16">
     <div class="container mx-auto px-4">
         <h2 class="heading heading-1 mb-4">
             @SharedLocalizer["NetConf_2025_Schedule_Title"]