Bump PackageVersion_MsBuild from 16.7.0 to 16.8.0
Bump PackageVersion_MsBuild from 16.7.0 to 16.8.0

Bumps `PackageVersion_MsBuild` from 16.7.0 to 16.8.0.

Updates `Microsoft.Build` from 16.7.0 to 16.8.0
- [Release notes](https://github.com/microsoft/msbuild/releases)
- [Commits](https://github.com/microsoft/msbuild/commits)

Updates `Microsoft.Build.Framework` from 16.7.0 to 16.8.0
- [Release notes](https://github.com/microsoft/msbuild/releases)
- [Commits](https://github.com/microsoft/msbuild/commits)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
ermshiperete/GitVersion,asbjornu/GitVersion,ermshiperete/GitVersion,ParticularLabs/GitVersion,GitTools/GitVersion,ParticularLabs/GitVersion,ermshiperete/GitVersion,asbjornu/GitVersion,GitTools/GitVersion,gep13/GitVersion,ermshiperete/GitVersion,gep13/GitVersion