Fix the OpenTelemetry metrics tutorial (#37162)

Author: reyang

docs/core/diagnostics/metrics-collection.md

@@ -132,7 +132,7 @@ This tutorial shows one of the integrations available for OpenTelemetry metrics
 Add a reference to the OpenTelemetry Prometheus exporter to the example app:
 
 ```dotnetcli
-dotnet add package OpenTelemetry.Exporter.Prometheus.AspNetCore --prerelease
+dotnet add package OpenTelemetry.Exporter.Prometheus.HttpListener --prerelease
 ```
 
 > [!NOTE]
@@ -145,7 +145,7 @@ Update `Program.cs` with OpenTelemetry configuration:
 In the preceding code:
 
 - `AddMeter("HatCo.HatStore")` configures OpenTelemetry to transmit all the metrics collected by the Meter defined in the app.
-- `AddPrometheusExporter` configures OpenTelemetry to:
+- `AddPrometheusHttpListener` configures OpenTelemetry to:
   - Expose Prometheus' metrics endpoint on port `9184`
   - Use the HttpListener.
 

docs/core/diagnostics/snippets/Metrics/Program.cs

@@ -40,11 +40,7 @@ static void Main(string[] args)
     {
         using MeterProvider meterProvider = Sdk.CreateMeterProviderBuilder()
                 .AddMeter("HatCo.HatStore")
-                .AddPrometheusExporter(opt =>
-                {
-                    opt.StartHttpListener = true;
-                    opt.HttpListenerPrefixes = new string[] { $"http://localhost:9184/" };
-                })
+                .AddPrometheusHttpListener(options => options.UriPrefixes = new string[] { "http://localhost:9464/" })
                 .Build();
 
         var rand = Random.Shared;

docs/core/diagnostics/snippets/Metrics/metric-instr.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="OpenTelemetry.Exporter.Prometheus" Version="1.3.0-rc.2" />
+    <PackageReference Include="OpenTelemetry.Exporter.Prometheus.HttpListener" Version="1.6.0-rc.1" />
     <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="7.0.2" />
   </ItemGroup>