Bump NLog.Extensions.Logging in /src/NLog.Web.AspNetCore (#567)
Bump NLog.Extensions.Logging in /src/NLog.Web.AspNetCore (#567)

Bumps [NLog.Extensions.Logging](https://github.com/NLog/NLog.Extensions.Logging) from 1.6.3 to 1.6.4.
- [Release notes](https://github.com/NLog/NLog.Extensions.Logging/releases)
- [Changelog](https://github.com/NLog/NLog.Extensions.Logging/blob/master/CHANGELOG.MD)
- [Commits](https://github.com/NLog/NLog.Extensions.Logging/compare/v1.6.3...v1.6.4)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>

Co-authored-by: dependabot-preview[bot] <6a4c1c4838f800d1998274cd5234e1f65c55e90c@users.noreply.github.com>
NLog/NLog.Web