Bump Microsoft.Owin in /Tests/LiquidProjections.Specs

Bumps [Microsoft.Owin](https://github.com/aspnet/AspNetKatana) from 3.1.0 to 4.1.1.
- [Release notes](https://github.com/aspnet/AspNetKatana/releases)
- [Commits](aspnet/AspNetKatana@v3.1.0...v4.1.1)

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

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

Author: dependabot[bot]

Tests/LiquidProjections.Specs/packages.config

@@ -4,7 +4,7 @@
   <package id="FluentAssertions" version="5.0.0" targetFramework="net452" />
   <package id="FluentAssertions.Json" version="5.0.0" targetFramework="net452" />
   <package id="LiquidProjections.Abstractions" version="3.0.0" targetFramework="net452" />
-  <package id="Microsoft.Owin" version="3.1.0" targetFramework="net452" />
+  <package id="Microsoft.Owin" version="4.1.1" targetFramework="net452" />
   <package id="Newtonsoft.Json" version="10.0.3" targetFramework="net452" />
   <package id="Owin" version="1.0" targetFramework="net452" />
   <package id="OwinHttpMessageHandler" version="1.3.8" targetFramework="net452" />