Bump ES output to include unicode-vs-compression fix

[yaauie]

Release notes

Updates the Elasticsearch output to include a fix for situations where events containing non-unicode strings could be serialized incorrectly when sending to Elasticsearch with http compression enabled

What does this PR do?

Updates ES output to consume logstash-plugins/logstash-output-elasticsearch#1171

Why is it important/What is the impact to the user?

When compression is enabled and events contain non-unicode characters, without this fix invalid payloads could be sent to Elasticsearch resulting in indexing rejections.

Checklist

• My code follows the style guidelines of this project
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] I have made corresponding change to the default configuration files (and/or docker env variables)
• [ ] I have added tests that prove my fix is effective or that my feature works

Related issues

• Relates: (backport: 11.4 for LS7.x) Fixes an issue where events containing non-unicode strings. logstash-plugins/logstash-output-elasticsearch#1171

Use cases

• ES Output with http compression enabled

[elasticmachine]

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[mashhurs]

LGTM! Thank you!