Bump Polly from 8.0.0-alpha.2 to 8.0.0-alpha.6 in /src/ApiService

Bumps [Polly](https://github.com/App-vNext/Polly) from 8.0.0-alpha.2 to 8.0.0-alpha.6.
- [Release notes](https://github.com/App-vNext/Polly/releases)
- [Changelog](https://github.com/App-vNext/Polly/blob/main/CHANGELOG.md)
- [Commits](App-vNext/Polly@8.0.0-alpha.2...8.0.0-alpha.6)

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

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

Author: dependabot[bot]

src/ApiService/ApiService/ApiService.csproj

@@ -51,7 +51,7 @@
     <PackageReference Include="Octokit" Version="2.0.1" />
     <PackageReference Include="Microsoft.TeamFoundationServer.Client" Version="19.219.0-preview" />
     <PackageReference Include="SmartAnalyzers.CSharpExtensions.Annotations" Version="4.2.7" />
-    <PackageReference Include="Polly" Version="8.0.0-alpha.2" />
+    <PackageReference Include="Polly" Version="8.0.0-alpha.6" />
     <PackageReference Include="Polly.Extensions.Http" Version="3.0.0" />
     <PackageReference Include="OpenTelemetry.Api" Version="1.5.0-rc.1" />
     <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="8.0.0-preview.4.23259.5" />