[DOCS] Add links to `flattened` datatype (#56794)#56962

Merged

lockewritesdocs merged 1 commit intoelastic:7.7from lockewritesdocs:docs__link_flattened_field-7.7

May 19, 2020

+57-48

Commits on May 19, 2020

[DOCS] Add links to flattened datatype (elastic#56794 )

Adam Locke
and
jrodewig
committed