Update dependency PolySharp to 1.16.0

Author: renovate[bot]

Directory.Packages.props

@@ -57,7 +57,7 @@
     <GlobalPackageReference Include="Microsoft.VisualStudio.Internal.MicroBuild.VisualStudio" Version="$(MicroBuildVersion)" />
     <!-- The condition works around https://github.com/dotnet/sdk/issues/44951 -->
     <GlobalPackageReference Include="Nerdbank.GitVersioning" Version="3.9.50" Condition="!('$(TF_BUILD)'=='true' and '$(dotnetformat)'=='true')" />
-    <GlobalPackageReference Include="PolySharp" Version="1.15.0" />
+    <GlobalPackageReference Include="PolySharp" Version="1.16.0" />
     <GlobalPackageReference Include="StyleCop.Analyzers.Unstable" Version="1.2.0.556" />
   </ItemGroup>
 </Project>