chore(deps): update dependency serilog.sinks.file to v6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Serilog.Sinks.File	5.0.0 -> 6.0.0

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Release Notes

serilog/serilog-sinks-file (Serilog.Sinks.File)

### [`v6.0.0`](https://togithub.com/serilog/serilog-sinks-file/releases/tag/v6.0.0) - [#​241](https://togithub.com/serilog/serilog-sinks-file/issues/241) - update package project URL ([@​Sjoerdsjoerd](https://togithub.com/Sjoerdsjoerd)) - [#​274](https://togithub.com/serilog/serilog-sinks-file/issues/274) - build against VS2022 ([@​SimonCropp](https://togithub.com/SimonCropp)) - [#​279](https://togithub.com/serilog/serilog-sinks-file/issues/279) - update publishing key ([@​SimonCropp](https://togithub.com/SimonCropp)) - [#​254](https://togithub.com/serilog/serilog-sinks-file/issues/254) - new issue tracker templates ([@​nblumhardt](https://togithub.com/nblumhardt)) - [#​295](https://togithub.com/serilog/serilog-sinks-file/issues/295) - update TFMs ([@​zachrybaker](https://togithub.com/zachrybaker)) - [#​303](https://togithub.com/serilog/serilog-sinks-file/issues/303) - publish SNUPKG ([@​MonticolaExplorator](https://togithub.com/MonticolaExplorator)) - [#​280](https://togithub.com/serilog/serilog-sinks-file/issues/280) - code cleanup ([@​sungam3r](https://togithub.com/sungam3r)) - [#​311](https://togithub.com/serilog/serilog-sinks-file/issues/311) - updates for Serilog 4 ([@​nblumhardt](https://togithub.com/nblumhardt)) ##### Breaking changes Drops support for pre-`netstandard2.0` TFMs. Users targeting earlier platforms should use version 5.x of this package instead.

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