Bump Cake.Frosting from 4.0.0 to 4.2.0 in /build (#2978)

Bumps [Cake.Frosting](https://github.com/cake-build/cake) from 4.0.0 to 4.2.0.
- [Release notes](https://github.com/cake-build/cake/releases)
- [Changelog](https://github.com/cake-build/cake/blob/develop/ReleaseNotes.md)
- [Commits](https://github.com/cake-build/cake/compare/v4.0.0...v4.2.0)

---
updated-dependencies:
- dependency-name: Cake.Frosting
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build/Build.csproj

@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Cake.Coverlet" Version="4.0.1" />
-    <PackageReference Include="Cake.Frosting" Version="4.0.0" />
+    <PackageReference Include="Cake.Frosting" Version="4.2.0" />
   </ItemGroup>
 
 </Project>