[7.x] [DOCS] Revises doc on adding data (#68038)#68416

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gchaps merged 1 commit intoelastic:7.xfrom gchaps:backport/7.x/pr-68038

Jun 5, 2020

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Commits on Jun 5, 2020

[DOCS] Revises doc on adding data (elastic#68038 )

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