Support for Elasticsearch 8

[sajuschi]

Has anyone already tried this adapter with Elasticsearch 8 and can share their experience? I am starting a new Elasticsearchcluster for Neos and would like it to be on the newest version possible.

[marcrobertscamao]

@sajuschi versions 8 & 9 are compatible with ElasticSearch 8 as documented https://github.com/Flowpack/Flowpack.ElasticSearch.ContentRepositoryAdaptor?tab=readme-ov-file#elasticsearch-and-neos-compatibility