doc: 更新 TableSection 示例滚动逻辑

Author: ArgoZhang

src/BootstrapBlazor.Server/Components/Samples/Table/TablesSelection.razor.js

@@ -1,12 +1,9 @@
 export function scroll(id) {
     const element = document.getElementById(id);
     if (element) {
-        const selectedRow = element.querySelector('.form-check.is-checked');
+        const selectedRow = element.querySelector('tr.active');
         if (selectedRow) {
-            const row = selectedRow.closest('tr');
-            if (row) {
-                row.scrollIntoView({ behavior: 'smooth', block: 'center' });
-            }
+            selectedRow.scrollIntoView({ behavior: 'smooth', block: 'center' });
         }
     }
 }