[incubator/elasticsearch] Promote elasticsearch to stable

[rendhalver]

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[timstoop]

I'd say the documentation needs a bit of a rewrite (at the very least, mentions of "up to v5" should be changed to "up to v6"). Not sure if this should be done before the Chart is promoted? Also, there's been another merge on the incubator Chart.

[rendhalver]

Thanks @timstoop That's a good plan. I will redo this.

[monotek]

Any update?
I also like to do a pr but like to wait until its promoted to stable...

[rendhalver]

I will get this fixed as soon as I can.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Any further update will cause the issue/pull request to no longer be considered stale. Thank you for your contributions.

[rendhalver]

I have closing this in favour of #8476