Update requirement 7.0.202 and fix blazor ComponentNineteen sample

Author: dodyg

projects/.net7/ComponentNineteen/Pages/Form.razor

@@ -1,6 +1,12 @@
-<input @bind:get="Value" @bind:set="ValueChanged" style="width:500px;" />
+<input @bind:get="Value" @bind:set="ValueChangedHandler" style="width:500px;" />
 
 @code {
     [Parameter] public string Value { get; set; }
+
     [Parameter] public EventCallback<string> ValueChanged { get; set; }
+
+    private async Task ValueChangedHandler(string value)
+    {
+        await  ValueChanged.InvokeAsync(value);
+    }
 }

projects/.net7/ComponentNineteen/Pages/Index.razor

@@ -6,7 +6,7 @@
 
 @Message <br/>
 
-<Form Value="@Message" ValueChanged="@MessageChanged" />
+<Form Value="@Message" ValueChanged="MessageChanged" />
 
 @code
 {

projects/.net7/README.MD

@@ -127,9 +127,7 @@ Samples in this section require .NET 7. You can download it from [here](https://
 
 * [Component - 18](ComponentEighteen) 
 
-  **BROKEN on GA** This sample demonstrates @bind:after modifier that allows to execute async code after a binding event has been completed (value has changed).
-  
-  https://github.com/dotnet/aspnetcore/issues/44957
+  This sample demonstrates @bind:after modifier that allows to execute async code after a binding event has been completed (value has changed).
 
 * [Component - 19](ComponentNineteen) 
 

projects/.net7/global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "7.0.100",
+    "version": "7.0.202",
     "rollForward": "major"
   }
 }