[7.11] [DOCS] Reformat avg bucket agg reference (#69751)#69832

Merged

jrodewig merged 1 commit intoelastic:7.11from jrodewig:backport/7.11/pr-69751

Mar 2, 2021

+98-76

Commits on Mar 2, 2021

[DOCS] Reformat avg bucket agg reference (#69751 )
jrodewig
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