Bump Microsoft.NET.Test.Sdk from 18.5.1 to 18.6.0

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -26,7 +26,7 @@
   <ItemGroup>
     <PackageVersion Include="$(TileDBNativePackageName)" Version="$(TileDBNativePackageVersion)" />
     <PackageVersion Include="GitHubActionsTestLogger" Version="3.0.4" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
     <PackageVersion Include="MSTest.TestAdapter" Version="4.2.3" />
     <PackageVersion Include="MSTest.TestFramework" Version="4.2.3" />
     <PackageVersion Include="coverlet.collector" Version="10.0.1" PrivateAssets="all" />