[Task]: Link Extension Workshop for Markdown Field Syntax

[chrstinalin]

Description

On markdown compatible fields for addons, there's a tooltip that specifies which types of Markdown are allowed. Currently, it refers to allowed syntax using the equivalent HTML tag.

This is confusing, since 1) HTML is no longer directly supported, and 2) does not explain how to use the Markdown syntax.

Instead, we should link directly to the extension workshop that explicitly outlines how to use the syntax.

Acceptance Criteria

Milestones/checkpoints

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1. The tooltip is replaced by a link to the extension workshop section that explains Markdown syntax.

Checks

• If I have identified that the work is specific to a repository, I have removed "repository:addons-server" or "repository:addons-frontend"

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