Bump Splat.NLog from 11.0.1 to 15.2.22 (#3507)

Bumps [Splat.NLog](https://github.com/reactiveui/splat) from 11.0.1 to 15.2.22.
- [Release notes](https://github.com/reactiveui/splat/releases)
- [Commits](reactiveui/splat@11.0.1...15.2.22)

---
updated-dependencies:
- dependency-name: Splat.NLog
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Max Lv <[email protected]>

Author: dependabot[bot]

Shadowsocks.WPF/Shadowsocks.WPF.csproj

@@ -56,7 +56,7 @@
     <PackageReference Include="ReactiveUI.Fody" Version="19.4.1" />
     <PackageReference Include="ReactiveUI.Validation" Version="3.1.7" />
     <PackageReference Include="ReactiveUI.WPF" Version="19.4.1" />
-    <PackageReference Include="Splat.NLog" Version="14.7.1" />
+    <PackageReference Include="Splat.NLog" Version="15.2.22" />
     <PackageReference Include="System.CommandLine" Version="2.0.0-beta4.24528.1" />
     <PackageReference Include="System.Reactive" Version="6.0.0" />
     <PackageReference Include="WPFLocalizeExtension" Version="3.10.0" />