Bump elasticsearch from 8.12.1 to 8.13.0 in /requirements

[dependabot[bot]]

Bumps elasticsearch from 8.12.1 to 8.13.0.

Release notes

Sourced from elasticsearch's releases.

8.13.0

• Added native OpenTelemetry support (#2435)
• Added optional orjson (a fast, correct JSON library) serialization support (#2493)
• Added the text_structure.test_grok_pattern API
• Added the indices.resolve_cluster API
• Renamed the model_id parameter to inference_id in the inference APIs
• Changed all synonyms APIs from experimental to stable.
• Fixed API key documentation (#2477, contributed by @​iuliaferoli)

Commits

• 833e779 [Backport 8.13] Ensure optional dependencies are optional (#2511)
• cafa395 Release 8.13.0
• 334ab69 [Backport 8.13] Fix CI badge in README (#2505)
• 2358dd3 [Backport 8.13] Switch back to released version of elastic-transport (#2506)
• 57ae8d7 [Backport 8.13] Document and enable OpenTelemetry instrumentation (#2502)
• fc8883f [Backport 8.13] Add optional orjson serializer support (#2501)
• 3f40047 [Backport 8.13] Added Python ML examples to the API docs (#2500)
• 47bd55d [Backport 8.13] Add inference doc code examples (#2497)
• b5a2439 [Backport 8.13] Rename es to client in examples for consistency (#2499)
• 98fb371 [Backport 8.13] Make helpers examples runnable (#2498)
• Additional commits viewable in compare view

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[dadokkio]

@dependabot rebase

[dependabot[bot]]

Looks like elasticsearch is no longer a dependency, so this is no longer needed.