Fix typo in src/Security/Authentication/Core/src/AuthenticationHandler.cs (#50114)

Author: alexbeeston

src/Security/Authentication/Core/src/AuthenticationHandler.cs

@@ -18,7 +18,7 @@ namespace Microsoft.AspNetCore.Authentication;
     private Task<AuthenticateResult>? _authenticateTask;
 
     /// <summary>
-    /// Gets or sets the <see cref="AuthenticationScheme"/> asssociated with this authentication handler.
+    /// Gets or sets the <see cref="AuthenticationScheme"/> associated with this authentication handler.
     /// </summary>
     public AuthenticationScheme Scheme { get; private set; } = default!;