[deps] Billing: Update 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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Configuration

📅 Schedule: Branch creation - "every 2nd week starting on the 2 week of the year before 4am on Monday" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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This PR was generated by Mend Renovate. View the repository job log.

[bitwarden-bot]

Internal tracking:

• ID: PM-15800
• Link: https://bitwarden.atlassian.net/browse/PM-15800

[renovate]

Edited/Blocked Notification

Renovate will not automatically rebase this PR, because it does not recognize the last commit author and assumes somebody else may have edited the PR.

You can manually request rebase by checking the rebase/retry box above.

⚠️ Warning: custom changes will be lost.

[github-actions]

Checkmarx One – Scan Summary & Details – 66985297-dced-47ed-a8da-d53a668887e0

New Issues

Severity	Issue	Source File / Package	Checkmarx Insight
	Missing_CSP_Header	/src/Core/MailTemplates/Handlebars/AdminConsole/DomainClaimedByOrganization.html.hbs: 5	Attack Vector

Fixed Issues

Severity	Issue	Source File / Package
	CSRF	/src/Billing/Controllers/RecoveryController.cs: 38
	CSRF	/src/Billing/Controllers/StripeController.cs: 164
	Privacy_Violation	/src/Api/Auth/Models/Request/Accounts/SetPasswordRequestModel.cs: 28
	Log_Forging	/src/Api/Auth/Controllers/EmergencyAccessController.cs: 159
	Log_Forging	/src/Api/Auth/Controllers/AccountsController.cs: 922
	Log_Forging	/src/Api/Auth/Controllers/AccountsController.cs: 261
	Log_Forging	/src/Api/Auth/Controllers/AccountsController.cs: 381

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.96%. Comparing base (a28e517) to head (36d57e6).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5128   +/-   ##
=======================================
  Coverage   42.96%   42.96%           
=======================================
  Files        1444     1444           
  Lines       66101    66101           
  Branches     6057     6057           
=======================================
  Hits        28397    28397           
  Misses      36422    36422           
  Partials     1282     1282           

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