Update dependency es_client to v8.15.2

[elastic-renovate-prod]

This PR contains the following updates:

Package	Type	Update	Change
es_client (changelog)	project.dependencies	patch	==8.15.0 -> ==8.15.2

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Release Notes

untergeek/es_client (es_client)

v8.15.2: 8.15.2 (30 September 2024)

Compare Source

Changes

• Python module version bumps:
  • elasticsearch8==8.15.1
  • pyyaml==6.0.2
  • certifi>=2024.8.30

v8.15.1: 8.15.1 (23 August 2024)

Compare Source

Changes

• Added commands.py as both a cleaner location for the show_all_options
  function, as well as a place it could be imported and re-used.
• Updated docs/example.rst and docs/tutorial.rst to reflect these
  location changes.
• Updated pytest.ini to automatically look for and use .env for
  environment variables for testing.
• Using versioned docker_test scripts now from
  https://github.com/untergeek/es-docker-test-scripts

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