Bump Polyfill from 7.12.0 to 7.13.0 in /src

Bumps [Polyfill](https://github.com/SimonCropp/Polyfill) from 7.12.0 to 7.13.0.
- [Commits](SimonCropp/Polyfill@7.12.0...7.13.0)

---
updated-dependencies:
- dependency-name: Polyfill
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

src/Directory.Packages.props

@@ -11,7 +11,7 @@
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="27.0.2" />
     <PackageVersion Include="Microsoft.AspNetCore.OpenApi" Version="8.0.4" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-    <PackageVersion Include="Polyfill" Version="7.12.0" />
+    <PackageVersion Include="Polyfill" Version="7.13.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.147" />
     <PackageVersion Include="Swashbuckle.AspNetCore" Version="7.2.0" />
     <PackageVersion Include="Verify" Version="28.9.0" />