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] <[email protected]>

Author: dependabot-preview[bot]

src/Directory.Build.props

@@ -26,7 +26,7 @@
         <PackageVersion_YamlDotNet>8.1.2</PackageVersion_YamlDotNet>
         <PackageVersion_NewtonsoftJson>12.0.3</PackageVersion_NewtonsoftJson>
         <PackageVersion_MicrosoftExtensions>3.0.0</PackageVersion_MicrosoftExtensions>
-        <PackageVersion_MsBuild>16.7.0</PackageVersion_MsBuild>
+        <PackageVersion_MsBuild>16.8.0</PackageVersion_MsBuild>
 
         <PackageVersion_MicrosoftTestSdk>16.8.0</PackageVersion_MicrosoftTestSdk>
         <PackageVersion_NSubstitute>4.2.2</PackageVersion_NSubstitute>