[7.x] [DOCS] Adds a section on runtime fields to the Discover intro (#99143)#99998

Merged

gchaps merged 1 commit intoelastic:7.xfrom gchaps:backport/7.x/pr-99143

May 12, 2021

+40-2

Commits on May 12, 2021

[DOCS] Adds a section on runtime fields to the Discover intro (elastic#99143 )

committed