Grammer in comments (#12355)

Author: Marcel0024

src/Components/Blazor/Blazor/src/Hosting/BlazorWebAssemblyHost.cs

@@ -4,12 +4,12 @@
 namespace Microsoft.AspNetCore.Blazor.Hosting
 {
     /// <summary>
-    /// Used to to create instances a Blazor host builder for a Browser application.
+    /// Used to create an instance of Blazor host builder for a Browser application.
     /// </summary>
     public static class BlazorWebAssemblyHost
     {
         /// <summary>
-        /// Creates a an instance of <see cref="IWebAssemblyHostBuilder"/>.
+        /// Creates an instance of <see cref="IWebAssemblyHostBuilder"/>.
         /// </summary>
         /// <returns>The <see cref="IWebAssemblyHostBuilder"/>.</returns>
         public static IWebAssemblyHostBuilder CreateDefaultBuilder()