🔼 Update dependency Serilog to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Serilog (source)	3.1.1 -> 4.0.0

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Release Notes

serilog/serilog (Serilog)

v4.0.0

• #​2045 — breaking use case-insensitive matching for level overrides (@​tillig)
• #​2015 — breaking unpin assembly version (@​nblumhardt)
• #​2051 — breaking recognize UtcTimestamp as a built-in token in output templates (@​MatthewHays)
• #​1979 — add tests for ReusableStringWriter (@​nblumhardt)
• #​2016 — update TFMs (@​nblumhardt, @​bartelink)
• #​2018 — add LogEvent.UnstableAssembleFromParts() (@​nblumhardt)
• #​2044 — build updates for compatibility (@​tillig)
• #​2027 — improve trimming annotations, compatibility switch for compiler-generated type support (@​agocke)
• #​2055 — introduce IBatchedLogEventSink and WriteTo.Sink(IBatchedLogEventSink) (@​nblumhardt)
• #​2060 — introduce LoggerSinkConfiguration.CreateSink() and redesign .Wrap() (@​nblumhardt, @​bartelink)
• #​2063 — improve MessageTemplateParser performance, switch to allow . in captured property names (@​nblumhardt)
• #​2064 — make message template alignment parsing match spec (@​Insomniak47)
• #​2065 — allow any character except } in message template format specifiers (@​Insomniak47)

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