[deps]: Update Serilog.Sinks.Seq to v8

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Serilog.Sinks.Seq (source)	7.0.1 -> 8.0.0

---

Release Notes

datalust/serilog-sinks-seq (Serilog.Sinks.Seq)

v8.0.0

• #​220, #​222, #​225 — update to Serilog 4 (@​nblumhardt)
• #​221 — link SerilogTracing from README.md (@​liammclennan)
• #​223 — convert dotted property names into nested values when Serilog 4's corresponding feature flag is set (@​nblumhardt)

---

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.

---

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

---

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