Update ModelContextProtocol version (dotnet#6870)

Author: MackinnonBuck

src/ProjectTemplates/GeneratedContent.targets

@@ -56,7 +56,7 @@
       <TemplatePackageVersion_MicrosoftExtensionsServiceDiscovery>9.3.1</TemplatePackageVersion_MicrosoftExtensionsServiceDiscovery>
       <TemplatePackageVersion_MicrosoftSemanticKernel>1.61.0</TemplatePackageVersion_MicrosoftSemanticKernel>
       <TemplatePackageVersion_MicrosoftSemanticKernel_Preview>1.61.0-preview</TemplatePackageVersion_MicrosoftSemanticKernel_Preview>
-      <TemplatePackageVersion_ModelContextProtocol>0.3.0-preview.2</TemplatePackageVersion_ModelContextProtocol>
+      <TemplatePackageVersion_ModelContextProtocol>0.4.0-preview.1</TemplatePackageVersion_ModelContextProtocol>
       <TemplatePackageVersion_OllamaSharp>5.1.18</TemplatePackageVersion_OllamaSharp>
       <TemplatePackageVersion_OpenTelemetry>1.12.0</TemplatePackageVersion_OpenTelemetry>
       <TemplatePackageVersion_PdfPig>0.1.10</TemplatePackageVersion_PdfPig>

test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/mcpserver.AotTrue.verified/mcpserver/mcpserver.csproj

@@ -38,7 +38,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.0" />
-    <PackageReference Include="ModelContextProtocol" Version="0.3.0-preview.2" />
+    <PackageReference Include="ModelContextProtocol" Version="0.4.0-preview.1" />
   </ItemGroup>
 
 </Project>

test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/mcpserver.Basic.verified/mcpserver/mcpserver.csproj

@@ -34,7 +34,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.0" />
-    <PackageReference Include="ModelContextProtocol" Version="0.3.0-preview.2" />
+    <PackageReference Include="ModelContextProtocol" Version="0.4.0-preview.1" />
   </ItemGroup>
 
 </Project>

test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/mcpserver.SelfContainedFalse.verified/mcpserver/mcpserver.csproj

@@ -27,7 +27,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.0" />
-    <PackageReference Include="ModelContextProtocol" Version="0.3.0-preview.2" />
+    <PackageReference Include="ModelContextProtocol" Version="0.4.0-preview.1" />
   </ItemGroup>
 
 </Project>

test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/mcpserver.net10.verified/mcpserver/mcpserver.csproj

@@ -34,7 +34,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.0" />
-    <PackageReference Include="ModelContextProtocol" Version="0.3.0-preview.2" />
+    <PackageReference Include="ModelContextProtocol" Version="0.4.0-preview.1" />
   </ItemGroup>
 
 </Project>