Bump Microsoft.Owin in /src/Umbraco.Forms.Integrations.TestSite

Bumps [Microsoft.Owin](https://github.com/aspnet/AspNetKatana) from 4.0.1 to 4.2.2.
- [Release notes](https://github.com/aspnet/AspNetKatana/releases)
- [Commits](aspnet/AspNetKatana@v4.0.1...v4.2.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/Umbraco.Forms.Integrations.TestSite/packages.config

@@ -31,7 +31,7 @@
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="2.0.1" targetFramework="net472" />
   <package id="Microsoft.Extensions.DependencyInjection.Abstractions" version="2.0.0" targetFramework="net472" />
   <package id="Microsoft.IO.RecyclableMemoryStream" version="1.2.2" targetFramework="net472" />
-  <package id="Microsoft.Owin" version="4.0.1" targetFramework="net472" />
+  <package id="Microsoft.Owin" version="4.2.2" targetFramework="net472" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="4.0.1" targetFramework="net472" />
   <package id="Microsoft.Owin.Security" version="4.0.1" targetFramework="net472" />
   <package id="Microsoft.Owin.Security.Cookies" version="4.0.1" targetFramework="net472" />