build(deps): bump Microsoft.Build.Framework from 17.11.4 to 17.12.6

Bumps [Microsoft.Build.Framework](https://github.com/dotnet/msbuild) from 17.11.4 to 17.12.6.
- [Release notes](https://github.com/dotnet/msbuild/releases)
- [Changelog](https://github.com/dotnet/msbuild/blob/main/documentation/Changelog.md)
- [Commits](dotnet/msbuild@v17.11.4...v17.12.6)

---
updated-dependencies:
- dependency-name: Microsoft.Build.Framework
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Directory.Packages.props

@@ -15,7 +15,7 @@
     <PackageVersion Include="coverlet.collector" Version="6.0.2" />
     <PackageVersion Include="FluentAssertions" Version="6.12.1" />
     <PackageVersion Include="Microsoft.Build" Version="17.10.4" />
-    <PackageVersion Include="Microsoft.Build.Framework" Version="17.11.4" />
+    <PackageVersion Include="Microsoft.Build.Framework" Version="17.12.6" />
     <PackageVersion Include="Microsoft.Build.Locator" Version="1.7.8" />
     <PackageVersion Include="Microsoft.Build.Utilities.Core" Version="17.11.4" />
     <PackageVersion Include="Microsoft.CSharp" Version="4.7.0" />