Bump the all-dependencies group with 1 update (#559)

Bumps Microsoft.NET.Test.Sdk from 17.14.1 to 18.0.0

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Directory.Packages.props

@@ -14,7 +14,7 @@
     <PackageVersion Include="JetBrains.Annotations" Version="2025.2.2" />
     <PackageVersion Include="Microsoft.AspNetCore.JsonPatch" Version="9.0.7" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.9" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
     <PackageVersion Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.21.2" />
     <PackageVersion Include="Moq" Version="4.20.72" />
     <PackageVersion Include="Polly.Core" Version="8.6.4" />