fix(Table): prevent javascript error when set IsDetails to true (#7813)

* fix: 修复脚本错误

* chore: bump version 10.5.0-beta04

Author: ArgoZhang

src/BootstrapBlazor/BootstrapBlazor.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
   <PropertyGroup>
-    <Version>10.5.0-beta02</Version>
+    <Version>10.5.0-beta04</Version>
   </PropertyGroup>
 
   <ItemGroup>

src/BootstrapBlazor/Components/Table/Table.razor.js

@@ -677,7 +677,7 @@ const setResizeListener = table => {
                         const rows = [...tbody.children].filter(i => i.nodeName === 'TR');
                         rows.forEach(row => {
                             const header = row.children.item(colIndex);
-                            if (header.classList.contains('fixed')) {
+                            if (header !== null && header.classList.contains('fixed')) {
                                 resizeNextFixedColumnWidth(header, calcColWidth);
                             }
                         });