Bump Microsoft.AspNet.WebApi.Client in /YAF.SampleWebApplication

Bumps [Microsoft.AspNet.WebApi.Client](https://github.com/aspnet/AspNetWebStack) from 5.2.7 to 5.2.8.
- [Release notes](https://github.com/aspnet/AspNetWebStack/releases)
- [Commits](https://github.com/aspnet/AspNetWebStack/commits)

---
updated-dependencies:
- dependency-name: Microsoft.AspNet.WebApi.Client
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]

YAF.SampleWebApplication/packages.config

@@ -13,7 +13,7 @@
   <package id="Microsoft.AspNet.SignalR.SystemWeb" version="2.4.3" targetFramework="net48" />
   <package id="Microsoft.AspNet.Web.Optimization" version="1.1.3" targetFramework="net472" />
   <package id="Microsoft.AspNet.Web.Optimization.WebForms" version="1.1.3" targetFramework="net472" />
-  <package id="Microsoft.AspNet.WebApi.Client" version="5.2.7" targetFramework="net48" />
+  <package id="Microsoft.AspNet.WebApi.Client" version="5.2.8" targetFramework="net48" />
   <package id="Microsoft.AspNet.WebApi.Core" version="5.2.7" targetFramework="net48" />
   <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.7" targetFramework="net48" />
   <package id="Microsoft.AspNet.WebPages" version="3.2.7" targetFramework="net48" />