Update dependency Serilog.AspNetCore to v9

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Serilog.AspNetCore	8.0.3 -> 9.0.0

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Release Notes

serilog/serilog-aspnetcore (Serilog.AspNetCore)

v9.0.0

What's Changed

• #​388 - update to .NET 9 SDK, Serilog.Extensions.Hosting/Serilog.Settings.Configuration 9.0.0, Serilog 4.2.0 (@​nblumhardt)

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[Piedone]

So, this still needs a second opinion, despite us talking about it at the meeting :D. @MikeAlhayek or @sebastienros?