Bump the nuget-dependencies group with 1 update

Bumps Microsoft.NET.Test.Sdk from 18.8.1 to 18.9.0

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: nuget-dependencies
...

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

Author: dependabot[bot]

CorpusSearch.Test/CorpusSearch.Test.csproj

@@ -22,7 +22,7 @@
   <ItemGroup>
     <PackageReference Include="NUnit" Version="4.6.1" />
     <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
   </ItemGroup>
 
   <ItemGroup>