clean up warning and mark to dotnet8

Author: dodyg

projects/httpclientfactory/README.md

@@ -15,3 +15,5 @@
   * [HttpClientFactory - 4](httpclientfactory-4)
 
     Use `IServiceCollection.AddHttpClient` to provide `HttpClient` for interface-implementing classes.
+
+dotnet8

projects/ihosted-service/README.md

@@ -8,4 +8,4 @@
 
   Implement background tasks using the new `IHostedService` interface and a timer. This example comes from the technique outlined in this [ASP.NET Core documentation](https://docs.microsoft.com/en-us/aspnet/core/fundamentals/host/hosted-services). 
 
-dotnet6
+dotnet8

projects/json/README.md

@@ -107,3 +107,4 @@ All about the new `System.Text.Json` namespace.
 
   In this case we add one extra `timestamp` property to the serialization process. 
 
+dotnet8

projects/localization/README.md

@@ -27,4 +27,4 @@
     This is a continuation of previous sample but with context, which allows the same translation key to return different strings.
 
 
-dotnet6
+dotnet8

projects/localization/localization-6/Program.cs

@@ -26,30 +26,28 @@
 app.UseRequestLocalization(option);
 
 app.UseRouting();
-app.UseEndpoints(endpoints =>
-{
-    endpoints.MapGet("greet-friend", async context =>
-    {
-        var fac = context.RequestServices.GetService<IStringLocalizerFactory>();
-        var local = fac.Create("Greet Friend", string.Empty);
 
-        var requestCulture = context.Features.Get<IRequestCultureFeature>().RequestCulture;
+app.MapGet("greet-friend", async context =>
+{
+    var fac = context.RequestServices.GetService<IStringLocalizerFactory>();
+    var local = fac.Create("Greet Friend", string.Empty);
 
-        await context.Response.WriteAsync($"Request Culture `{requestCulture.UICulture}` = {local["Hello"]}");
-    });
+    var requestCulture = context.Features.Get<IRequestCultureFeature>().RequestCulture;
 
-    endpoints.MapGet("greet-lover", async context =>
-    {
-        var fac = context.RequestServices.GetService<IStringLocalizerFactory>();
-        var local = fac.Create("Greet Lover", string.Empty);
+    await context.Response.WriteAsync($"Request Culture `{requestCulture.UICulture}` = {local["Hello"]}");
+});
 
-        var requestCulture = context.Features.Get<IRequestCultureFeature>().RequestCulture;
+app.MapGet("greet-lover", async context =>
+{
+    var fac = context.RequestServices.GetService<IStringLocalizerFactory>();
+    var local = fac.Create("Greet Lover", string.Empty);
 
-        await context.Response.WriteAsync($"Request Culture `{requestCulture.UICulture}` = {local["Hello"]}");
-    });
+    var requestCulture = context.Features.Get<IRequestCultureFeature>().RequestCulture;
 
+    await context.Response.WriteAsync($"Request Culture `{requestCulture.UICulture}` = {local["Hello"]}");
 });
 
+
 app.Run(async context =>
 {
     var fac = context.RequestServices.GetService<IStringLocalizerFactory>();