.Net: fix bug: Example Step00 of Process Framework is wrong (#10119)

#10087

Co-authored-by: feiyun0112 <feiyun0112@hotmail.com>
Co-authored-by: Chris <66376200+crickman@users.noreply.github.com>

Author: 3 people

dotnet/samples/GettingStartedWithProcesses/Step00/Step00_Processes.cs

@@ -27,17 +27,15 @@ public async Task UseSimplestProcessAsync()
         Kernel kernel = Kernel.CreateBuilder()
             .Build();
 
-        ProcessBuilder processBuilder = new(nameof(Step00_Processes));
-
         // Create a process that will interact with the chat completion service
         ProcessBuilder process = new("ChatBot");
-        var startStep = processBuilder.AddStepFromType<StartStep>();
-        var doSomeWorkStep = processBuilder.AddStepFromType<DoSomeWorkStep>();
-        var doMoreWorkStep = processBuilder.AddStepFromType<DoMoreWorkStep>();
-        var lastStep = processBuilder.AddStepFromType<LastStep>();
+        var startStep = process.AddStepFromType<StartStep>();
+        var doSomeWorkStep = process.AddStepFromType<DoSomeWorkStep>();
+        var doMoreWorkStep = process.AddStepFromType<DoMoreWorkStep>();
+        var lastStep = process.AddStepFromType<LastStep>();
 
         // Define the process flow
-        processBuilder
+        process
             .OnInputEvent(ProcessEvents.StartProcess)
             .SendEventTo(new ProcessFunctionTargetBuilder(startStep));