[dependabot]: Bump Microsoft.TeamFoundationServer.Client from 19.225.2 to 20.256.2

---
updated-dependencies:
- dependency-name: Microsoft.TeamFoundationServer.Client
  dependency-version: 20.256.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

src/ImageBuilder/Microsoft.DotNet.ImageBuilder.csproj

@@ -29,7 +29,7 @@
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.14" />
     <PackageReference Include="Microsoft.Deployment.DotNet.Releases" Version="1.0.1" />
     <PackageReference Include="Microsoft.DotNet.VersionTools" Version="9.0.0-beta.25255.5" />
-    <PackageReference Include="Microsoft.TeamFoundationServer.Client" Version="19.225.2" />
+    <PackageReference Include="Microsoft.TeamFoundationServer.Client" Version="20.256.2" />
     <PackageReference Include="Newtonsoft.Json.Schema" Version="4.0.1" />
     <PackageReference Include="Octokit" Version="14.0.0" />
     <PackageReference Include="OrasProject.Oras" Version="0.5.0" />