Bump ModelContextProtocol and ModelContextProtocol.AspNetCore

Bumps ModelContextProtocol from 0.3.0-preview.4 to 1.2.0
Bumps ModelContextProtocol.AspNetCore from 0.3.0-preview.4 to 1.2.0

---
updated-dependencies:
- dependency-name: ModelContextProtocol
  dependency-version: 1.2.0
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: ModelContextProtocol.AspNetCore
  dependency-version: 1.2.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -50,8 +50,8 @@
     <PackageVersion Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.23.0" />
     <PackageVersion Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="10.0.2" />
     <PackageVersion Include="Microsoft.Extensions.AI.OpenAI" Version="10.0.1-preview.1.25571.5" />
-    <PackageVersion Include="ModelContextProtocol" Version="0.3.0-preview.4" />
-    <PackageVersion Include="ModelContextProtocol.AspNetCore" Version="0.3.0-preview.4" />
+    <PackageVersion Include="ModelContextProtocol" Version="1.2.0" />
+    <PackageVersion Include="ModelContextProtocol.AspNetCore" Version="1.2.0" />
     <PackageVersion Include="Moq" Version="4.20.72" />
     <PackageVersion Include="Moq.AutoMock" Version="4.0.2" />
     <PackageVersion Include="System.CommandLine" Version="2.0.7" />