[DOC] Remove concurrent search composite aggs limitations

[jed326]

What do you want to do?

• Request a change to existing documentation
• Add new documentation
• Report a technical problem with the documentation
• Other

Tell us about your request. Provide a summary of the request.
Remove composite agg limitation from https://opensearch.org/docs/latest/search-plugins/concurrent-segment-search/#limitations after following PR has been released:

• Support scripting for composite aggs in concurrent segment search OpenSearch#15072

Repo link:

documentation-website/_search-plugins/concurrent-segment-search.md

Line 98 in 23e1ffb

- Composite aggregations that use scripts. See [this GitHub issue](https://github.com/opensearch-project/OpenSearch/issues/12947) for more information. Composite aggregations without scripts do support concurrent segment search.

*Version: List the OpenSearch version to which this issue applies, e.g. 2.14, 2.12--2.14, or all.
2.17

What other resources are available? Provide links to related issues, POCs, steps for testing, etc.
PR: opensearch-project/OpenSearch#15072