Bump Microsoft.Owin.Host.SystemWeb in /YAF.SampleWebApplication

Bumps [Microsoft.Owin.Host.SystemWeb](https://github.com/aspnet/AspNetKatana) from 4.2.0 to 4.2.1.
- [Release notes](https://github.com/aspnet/AspNetKatana/releases)
- [Commits](aspnet/AspNetKatana@v4.2.0...v4.2.1)

---
updated-dependencies:
- dependency-name: Microsoft.Owin.Host.SystemWeb
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

YAF.SampleWebApplication/packages.config

@@ -19,7 +19,7 @@
   <package id="Microsoft.AspNet.WebPages" version="3.2.7" targetFramework="net48" />
   <package id="Microsoft.Bcl.AsyncInterfaces" version="6.0.0" targetFramework="net48" />
   <package id="Microsoft.Owin" version="4.2.1" targetFramework="net48" />
-  <package id="Microsoft.Owin.Host.SystemWeb" version="4.2.0" targetFramework="net48" />
+  <package id="Microsoft.Owin.Host.SystemWeb" version="4.2.1" targetFramework="net48" />
   <package id="Microsoft.Owin.Security" version="4.2.1" targetFramework="net48" />
   <package id="Microsoft.Owin.Security.Cookies" version="4.2.0" targetFramework="net48" />
   <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net472" />