Bump Polyfill from 8.8.0 to 9.3.1

---
updated-dependencies:
- dependency-name: Polyfill
  dependency-version: 9.3.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -52,6 +52,7 @@
     <PackageVersion Include="NuGet.Packaging" Version="6.14.0" />
     <PackageVersion Include="Octokit" Version="14.0.0" />
     <PackageVersion Include="OpenAI" Version="2.7.0" />
+    <PackageVersion Include="Polyfill" Version="9.3.1" />
     <PackageVersion Include="Spectre.Console" Version="0.50.0" />
     <PackageVersion Include="Spectre.Console.Analyzer" Version="1.0.0" />
     <PackageVersion Include="Spectre.Console.Cli" Version="0.50.0" />

ProjectDirector/ProjectDirector.csproj

@@ -23,5 +23,6 @@
     <PackageReference Include="LibGit2Sharp" />
     <PackageReference Include="Octokit" />
     <PackageReference Include="OpenAI" />
+  <PackageReference Include="Polyfill" />
   </ItemGroup>
 </Project>