[release/8.0-preview5] Update templates for ServiceDiscovery API changes

src/Aspire.ProjectTemplates/templates/aspire-empty/AspireApplication.1.ServiceDefaults/Extensions.cs

@@ -25,7 +25,7 @@ public static IHostApplicationBuilder AddServiceDefaults(this IHostApplicationBu
             http.AddStandardResilienceHandler();
 
             // Turn on service discovery by default
-            http.UseServiceDiscovery();
+            http.AddServiceDiscovery();
         });
 
         return builder;

src/Aspire.ProjectTemplates/templates/aspire-servicedefaults/Extensions.cs

@@ -26,7 +26,7 @@ public static IHostApplicationBuilder AddServiceDefaults(this IHostApplicationBu
             http.AddStandardResilienceHandler();
 
             // Turn on service discovery by default
-            http.UseServiceDiscovery();
+            http.AddServiceDiscovery();
         });
 
         // Uncomment the following to restrict the allowed schemes for service discovery.

src/Aspire.ProjectTemplates/templates/aspire-starter/AspireStarterApplication.1.ServiceDefaults/Extensions.cs

@@ -25,7 +25,7 @@ public static IHostApplicationBuilder AddServiceDefaults(this IHostApplicationBu
             http.AddStandardResilienceHandler();
 
             // Turn on service discovery by default
-            http.UseServiceDiscovery();
+            http.AddServiceDiscovery();
         });
 
         return builder;