Bump NLog from 5.2.5 to 5.2.6 (#706)

Bumps [NLog](https://github.com/NLog/NLog) from 5.2.5 to 5.2.6.
- [Release notes](https://github.com/NLog/NLog/releases)
- [Changelog](https://github.com/NLog/NLog/blob/dev/CHANGELOG.md)
- [Commits](NLog/NLog@v5.2.5...v5.2.6)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/NLog.Extensions.Logging/NLog.Extensions.Logging.csproj

@@ -77,7 +77,7 @@ List of major changes in NLog 5.0: https://nlog-project.org/2021/08/25/nlog-5-0-
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="NLog" Version="5.2.5" />
+    <PackageReference Include="NLog" Version="5.2.6" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'net461' ">