Change ProtectedResourceMetadata URI properties to strings and build resource strings directly (#1264)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: halter73 <54385+halter73@users.noreply.github.com>
Co-authored-by: Stephen Halter <halter73@gmail.com>

samples/ProtectedMcpServer/Program.cs

@@ -56,8 +56,8 @@ builder.Services.AddAuthentication(options =>
 {
     options.ResourceMetadata = new()
     {
-        ResourceDocumentation = new Uri("https://docs.example.com/api/weather"),
-        AuthorizationServers = { new Uri(inMemoryOAuthServerUrl) },
+        ResourceDocumentation = "https://docs.example.com/api/weather",
+        AuthorizationServers = { inMemoryOAuthServerUrl },
         ScopesSupported = ["mcp:tools"],
     };
 });