Bump Polyfill from 6.4.1 to 6.5.0 in /src (#279)

src/Directory.Packages.props

@@ -8,7 +8,7 @@
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="27.0.2" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />
     <PackageVersion Include="NodaTime" Version="3.1.11" />
-    <PackageVersion Include="Polyfill" Version="6.4.1" />
+    <PackageVersion Include="Polyfill" Version="6.5.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.134" />
     <PackageVersion Include="Verify" Version="26.3.1" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.0" />