Update docker.elastic.co/kibana/kibana Docker tag to v8.15.1

[renovate]

This PR contains the following updates:

Package	Update	Change
docker.elastic.co/kibana/kibana (source)	patch	8.15.0 -> 8.15.1

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Release Notes

elastic/kibana (docker.elastic.co/kibana/kibana)

v8.15.1: Kibana 8.15.1

Compare Source

Downloads: https://elastic.co/downloads/kibana
Release notes: https://www.elastic.co/guide/en/kibana/8.15/release-notes-8.15.1.html

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Configuration

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.19%. Comparing base (b35c33c) to head (76178ba).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8372      +/-   ##
==========================================
+ Coverage   66.18%   66.19%   +0.01%     
==========================================
  Files         597      597              
  Lines       60396    60396              
  Branches     6204     6210       +6     
==========================================
+ Hits        39971    39978       +7     
+ Misses      20425    20418       -7     

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