replace broken codespan markdown

General MR

Summary

Small docs fix to replace unsupported markdown in Mermaid flowchart

Relevant logs/screenshots

Linked Issue

N/A

Upgrade Notices

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added kinddocs label

assigned to @peter.sigur

marked this merge request as ready

added statusreview label

requested review from @andrewshoell, @chris.oconnell, and @michaelmartin

approved this merge request

mentioned in commit cf0c5cf5

merged