Bump Microsoft.Extensions.Http.Polly from 6.0.7 to 6.0.8 in /src (#1055)

Bumps [Microsoft.Extensions.Http.Polly](https://github.com/dotnet/aspnetcore) from 6.0.7 to 6.0.8.
- [Release notes](https://github.com/dotnet/aspnetcore/releases)
- [Changelog](https://github.com/dotnet/aspnetcore/blob/main/docs/ReleasePlanning.md)
- [Commits](dotnet/aspnetcore@v6.0.7...v6.0.8)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/AzureIoTHub.Portal/Server/AzureIoTHub.Portal.Server.csproj

@@ -44,7 +44,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="6.0.7" />
+    <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="6.0.8" />
     <PackageReference Include="Microsoft.Graph" Version="4.35.0" />
     <PackageReference Include="Microsoft.OpenApi" Version="1.3.2" />
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.16.1" />