Bump NLog and NLog.Extensions.Logging

Bumps [NLog](https://github.com/NLog/NLog) and [NLog.Extensions.Logging](https://github.com/NLog/NLog.Extensions.Logging). These dependencies needed to be updated together.

Updates `NLog` from 5.3.4 to 5.3.4
- [Release notes](https://github.com/NLog/NLog/releases)
- [Changelog](https://github.com/NLog/NLog/blob/dev/CHANGELOG.md)
- [Commits](NLog/NLog@v5.3.4...v5.3.4)

Updates `NLog.Extensions.Logging` from 5.3.14 to 5.3.15
- [Release notes](https://github.com/NLog/NLog.Extensions.Logging/releases)
- [Changelog](https://github.com/NLog/NLog.Extensions.Logging/blob/master/CHANGELOG.MD)
- [Commits](NLog/NLog.Extensions.Logging@v5.3.14...v5.3.15)

---
updated-dependencies:
- dependency-name: NLog
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: NLog.Extensions.Logging
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/Contrast.K8s.AgentOperator/Contrast.K8s.AgentOperator.csproj

@@ -25,7 +25,7 @@
 
         <PackageReference Include="NLog" Version="5.3.4" />
         <PackageReference Include="NLog.Web.AspNetCore" Version="5.3.14" />
-        <PackageReference Include="NLog.Extensions.Logging" Version="5.3.14" />
+        <PackageReference Include="NLog.Extensions.Logging" Version="5.3.15" />
 
         <PackageReference Include="Glob" Version="1.1.9" />
         <PackageReference Include="MediatR" Version="12.4.1" />