Dropdown titles with formatting incorrectly render

[KOTungseth]

Describe the bug

Dropdown titles with bold text in the old system render as **text** in Elastic Docs v3.

AsciiDoc:

.*Example search request* with semantic reranker
[%collapsible]
==============
The following example shows a search request that uses a semantic reranker to reorder the top-k documents based on their semantic similarity to the query.

Markdown:

::::{dropdown} Example search request with semantic reranker The following example shows a search request that uses a semantic reranker to reorder the top-k documents based on their semantic similarity to the query.

Expected behavior

Dropdown titles in Elastic Docs v3 are bold by default. Any text formatting should be removed in dropdown titles.

Steps to reproduce

No response

Tooling

• docs-builder
• migration tooling
• I'm not sure

[leemthompo]

#320 flagged basically the same thing with minor specific differences

like do we want to default to the entire dropdown title being bold or do we want to be able to add differentiated styling?

[colleenmcginnis]

Inline code formatting is also not rendered, like here:

[KOTungseth]

Keeping dropdown titles in a consistent bold-only format ensures a clear, uniform, and easy-to-scan experience for users. Adding monospace or italics introduces visual inconsistency and reduces readability.