Bump Akka.TestKit.XUnit2 from 1.5.8 to 1.5.14

Bumps [Akka.TestKit.XUnit2](https://github.com/akkadotnet/akka.net) from 1.5.8 to 1.5.14.
- [Release notes](https://github.com/akkadotnet/akka.net/releases)
- [Changelog](https://github.com/akkadotnet/akka.net/blob/dev/RELEASE_NOTES.md)
- [Commits](akkadotnet/akka.net@1.5.8...1.5.14)

---
updated-dependencies:
- dependency-name: Akka.TestKit.XUnit2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/Directory.Packages.props

@@ -15,7 +15,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.6.3" />
     <PackageVersion Include="xunit" Version="2.5.1" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.5.1" />
-    <PackageVersion Include="Akka.TestKit.XUnit2" Version="1.5.8" />
+    <PackageVersion Include="Akka.TestKit.XUnit2" Version="1.5.14" />
     <PackageVersion Include="FluentAssertions" Version="6.11.0" />
   </ItemGroup>
 </Project>