Update dependency Polyfill to v9

Author: renovate[bot]

Directory.Packages.props

@@ -22,7 +22,7 @@
         <PackageVersion Include="JetBrains.dotCover.CommandLineTools" Version="2024.3.9" />
         <PackageVersion Include="JetBrains.ExternalAnnotations" Version="10.2.166" />
         <PackageVersion Include="JetBrains.ReSharper.GlobalTools" Version="2024.3.9" />
-        <PackageVersion Include="Polyfill" Version="8.9.1" />
+        <PackageVersion Include="Polyfill" Version="9.6.0" />
         <PackageVersion Include="GitVersion.Tool" Version="6.5.1" />
         <PackageVersion Include="Nuke.Common" Version="9.0.4" />
         <PackageVersion Include="ReportGenerator" Version="5.5.1" />