Bump Microsoft.Owin from 2.1.0 to 4.2.2 in /aspnet-samples/ChatRoomLocal (#209)

Bumps [Microsoft.Owin](https://github.com/aspnet/AspNetKatana) from 2.1.0 to 4.2.2.
- [Release notes](https://github.com/aspnet/AspNetKatana/releases)
- [Commits](https://github.com/aspnet/AspNetKatana/compare/v2.1.0...v4.2.2)

---
updated-dependencies:
- dependency-name: Microsoft.Owin
  dependency-type: direct:production
...

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aspnet-samples/ChatRoomLocal/packages.config

@@ -7,7 +7,7 @@
   <package id="Microsoft.AspNet.SignalR.SystemWeb" version="2.4.1" targetFramework="net461" />
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="1.0.8" targetFramework="net461" />
   <package id="Microsoft.Net.Compilers" version="2.6.1" targetFramework="net461" developmentDependency="true" />
-  <package id="Microsoft.Owin" version="2.1.0" targetFramework="net461" />
+  <package id="Microsoft.Owin" version="4.2.2" targetFramework="net461" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="2.1.0" targetFramework="net461" />
   <package id="Microsoft.Owin.Security" version="2.1.0" targetFramework="net461" />
   <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net461" />