Update dependency Serilog to v2.7.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
Serilog	nuget	minor	2.6.0 -> 2.7.1	source

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Release Notes

serilog/serilog

v2.7.1

Compare Source

Version 2.7.0 was skipped due to a versioning mistake.

• #​1075 - overload of LoggerSinkConfiguration.Wrap() accepting LoggingLevelSwitch
• #​1083 - update package metadata, including https:// project and icon URLs
• #​1091 - make {Properties:j} work consistently with the console sink
• #​1110 - expose an efficient Logger.None
• #​1113 - (tooling) improve tests for LogContext
• #​1136 - (tooling) fix build.sh exit code
• #​1141 - fix logging of byte[] smaller than 1 KB
• #​1157 - (tooling) update .gitignore
• #​1158 - (tooling) re-enable macOS builds
• #​1163 - SourceLink v2 support
• #​1165 - fix a number of issues with LoggerSinkConfiguration.Wrap() affecting WriteTo.Async()
• #​1134 - (tooling) add README badges for downloads/stats
• #​1166 - allow LoggerConfiguration to be garbage collected after logger is created
• #​1160 - (tooling) update NuGet.org API key
• (tooling) Update to use the latest .NET SDK

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