Bump NLog from 5.4.0 to 6.0.3

---
updated-dependencies:
- dependency-name: NLog
  dependency-version: 6.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

cs-windows-firewall-bouncer/cs-windows-firewall-bouncer.csproj

@@ -23,7 +23,7 @@
   <ItemGroup>
     <PackageReference Include="CommandLineParser" Version="2.9.1" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageReference Include="NLog" Version="5.4.0" />
+    <PackageReference Include="NLog" Version="6.0.3" />
     <PackageReference Include="System.Runtime" Version="4.3.1" />
     <PackageReference Include="System.ServiceProcess.ServiceController" Version="9.0.4" />
     <PackageReference Include="YamlDotNet" Version="16.3.0" />