Cherry-pick to 7.13: Update decode_json_fields.asciidoc (#25056)#25213

Merged

bmorelli25 merged 1 commit intoelastic:7.13from bmorelli25:backport/7.13/pr-25056

Apr 23, 2021

+15-18

Commits on Apr 21, 2021

Update decode_json_fields.asciidoc (elastic#25056 )

committed