chore: 更改文件编码

Author: ArgoZhang

src/components/BootstrapBlazor.DockView/wwwroot/css/dockview-bb.css

@@ -1,4 +1,4 @@
-@import './dockview.css';
+@import './dockview.css';
 
 .bb-dockview {
     --bb-dockview-padding: .25rem;