Bump Microsoft.Build.Tasks.Core from 17.12.6 to 17.13.9

Bumps [Microsoft.Build.Tasks.Core](https://github.com/dotnet/msbuild) from 17.12.6 to 17.13.9.
- [Release notes](https://github.com/dotnet/msbuild/releases)
- [Changelog](https://github.com/dotnet/msbuild/blob/main/documentation/Changelog.md)
- [Commits](dotnet/msbuild@v17.12.6...v17.13.9)

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

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

Author: dependabot[bot]

Directory.Packages.props

@@ -19,6 +19,6 @@
 
     <ItemGroup>
         <PackageVersion Include="Microsoft.Build.Tasks.Core"
-                        Version="17.12.6" />
+                        Version="17.13.9" />
     </ItemGroup>
 </Project>