chore: Bump Sipi version to 3.8.6

[subotic]

Pull Request Checklist

Task Description/Number

relates to: INFRA-455

PR Type

• build/chore: maintenance tasks (no production code change)
• docs: documentation changes (no production code change)
• feat: represents new features
• fix: represents bug fixes
• perf: performance improvements
• refactor: represents production code refactoring
• test: adding or refactoring tests (no production code change)

Basic requirements for bug fixes and features

• Tests for the changes have been added
• Docs have been added / updated

Does this PR introduce a breaking change?

• Yes

Does this PR change client-test-data?

• Yes

[linear]

INFRA-455 Reduce SIPI logging

SIPI is logging excessively; probably from Sentry?
If not addressed we might exceed our log budget on DataDog.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (ef714c1) 11.64% compared to head (de7e4c5) 88.50%.
Report is 2 commits behind head on main.

Files	Patch %	Lines
...org/knora/webapi/responders/v2/SearchQueries.scala	80.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2947       +/-   ##
===========================================
+ Coverage   11.64%   88.50%   +76.85%     
===========================================
  Files         246      247        +1     
  Lines       22885    22878        -7     
===========================================
+ Hits         2666    20249    +17583     
+ Misses      20219     2629    -17590     

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