Docs: clarify Listing Sync Pro activation error guidance (363942)

[cursor]

JIRA: https://vendasta.jira.com/browse/DAT-3137

Change classification

• UI / UX change
• Feature behavior change

Summary of documentation updates

• Updated an existing doc: docusaurus/docs/accounts/manage-accounts/product-management.mdx
• Added concise guidance in the activation failure FAQ for listing products (including Listing Sync Pro): if activation shows Invalid business name, remove emojis from the account business name and retry activation.

Existing docs vs new docs

• Existing documentation updated (no new page created).

Placement reasoning

• The issue affects product activation behavior and troubleshooting.
• The Manage products page already contains the activation failure FAQ, making it the most accurate and lowest-friction place for this guidance.

Acceptance criteria coverage

• User-facing error messaging clarified as actionable behavior for docs users.
• Validation behavior represented: unsupported emoji characters in business names can block listing product activation and surface Invalid business name.

Figma/images used

• No Figma links provided.
• Jira screenshots were not required for this update because behavior was clearly described in issue comments and resolution notes.

Skills used

• sprint-review skill guidance was reviewed and applied where relevant for release-safe, evergreen doc updates.
• Repository search/discovery tools were used to locate and prioritize existing docs.

Assumptions / limitations

• Jira payload did not include explicit acceptance-criteria fields; mapping was based on issue description and resolved comments.
• No merged linked PRs for DAT-3137 were discoverable in vendasta/partnercenter-docs; no additional code-author tags were added.

Review tags

@ahnikakuse
@haleyserrano
@maryam6samadi