Bump Microsoft.Extensions.Http.Polly in /FeatureFlags/FeatureFlags.Web

Bumps [Microsoft.Extensions.Http.Polly](https://github.com/dotnet/aspnetcore) from 5.0.1 to 6.0.0.
- [Release notes](https://github.com/dotnet/aspnetcore/releases)
- [Commits](dotnet/aspnetcore@v5.0.1...v6.0.0)

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

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

FeatureFlags/FeatureFlags.Web/FeatureFlags.Web.csproj

@@ -12,7 +12,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.18.0" />
     <PackageReference Include="Microsoft.AspNet.WebApi.Client" Version="5.2.7" />
-    <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="5.0.1" />
+    <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="6.0.0" />
   </ItemGroup>
 
   <ItemGroup>