Bump Polyfill from 8.9.0 to 8.9.1

---
updated-dependencies:
- dependency-name: Polyfill
  dependency-version: 8.9.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/Directory.Packages.props

@@ -8,7 +8,7 @@
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.0.0-beta.7" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
     <PackageVersion Include="NodaTime" Version="3.2.2" />
-    <PackageVersion Include="Polyfill" Version="8.9.0" />
+    <PackageVersion Include="Polyfill" Version="8.9.1" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.162" />
     <PackageVersion Include="Verify" Version="31.4.3" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />