[PM-6090] [deps] Platform: Update dotnet monorepo to v6.0.26

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Microsoft.AspNetCore.Authentication.JwtBearer (source)	6.0.25 -> 6.0.26
Microsoft.Extensions.Caching.StackExchangeRedis (source)	6.0.25 -> 6.0.26
Microsoft.Extensions.Identity.Stores (source)	6.0.25 -> 6.0.26

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Release Notes

dotnet/aspnetcore (Microsoft.AspNetCore.Authentication.JwtBearer)

v6.0.26: .NET 6.0.26

Release

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Configuration

📅 Schedule: Branch creation - "every weekend" (UTC), Automerge - At any time (no schedule defined).

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

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

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

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PM-6090

[djsmith85]

Closing as it's superseded by #3745

[bitwarden-bot]

Internal tracking:

• ID: PM-6090
• Link: https://bitwarden.atlassian.net/browse/PM-6090

[renovate]

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