Update dependency Microsoft.Build to 17.14.8

Author: renovate[bot]

Directory.Packages.props

@@ -6,7 +6,7 @@
     <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="Microsoft.Build" Version="17.8.3" />
+    <PackageVersion Include="Microsoft.Build" Version="17.14.8" />
     <PackageVersion Include="Microsoft.Build.Locator" Version="1.9.1" />
     <PackageVersion Include="Microsoft.VisualStudio.Validation" Version="17.8.8" />
     <PackageVersion Include="NuGet.Commands" Version="6.13.2" />