Bump ModelContextProtocol and ModelContextProtocol.AspNetCore

Bumps ModelContextProtocol from 0.3.0-preview.3 to 0.3.0-preview.4
Bumps ModelContextProtocol.AspNetCore from 0.3.0-preview.3 to 0.3.0-preview.4

---
updated-dependencies:
- dependency-name: ModelContextProtocol
  dependency-version: 0.3.0-preview.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: ModelContextProtocol.AspNetCore
  dependency-version: 0.3.0-preview.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Directory.Packages.props

@@ -42,8 +42,8 @@
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
     <PackageVersion Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.21.0" />
     <PackageVersion Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="9.0.0" />
-    <PackageVersion Include="ModelContextProtocol" Version="0.3.0-preview.3" />
-    <PackageVersion Include="ModelContextProtocol.AspNetCore" Version="0.3.0-preview.3" />
+    <PackageVersion Include="ModelContextProtocol" Version="0.3.0-preview.4" />
+    <PackageVersion Include="ModelContextProtocol.AspNetCore" Version="0.3.0-preview.4" />
     <PackageVersion Include="Moq" Version="4.20.72" />
     <PackageVersion Include="System.CommandLine" Version="2.0.0-beta6.25358.103" />
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />