Fix broken styles wasm demo

Author: Boris

demo/SimpleBlazorMultiselect.Demo.Wasm/wwwroot/index.html

@@ -8,7 +8,7 @@
     <base href="/"/>
     <link href="_content/SimpleBlazorMultiselect.Demo.Shared/app.css" rel="stylesheet" />
     <link rel="icon" type="image/png" href="favicon.png"/>
-    <link href="SimpleBlazorMultiselect.Demo.styles.css" rel="stylesheet"/>
+    <link href="SimpleBlazorMultiselect.Demo.Wasm.styles.css" rel="stylesheet"/>
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">
 </head>