According to the community FAQ, backticks and inline links are available for the bounty remark.
What other formatting features of Markdown are also supported on Bounty remarks?
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Bounty notices will support our Markdown mini format, using the same format as we allow for comments. The following will be allowed:
_italic_ and **bold** text, inline `code in backticks`, and [basic links](http://example.com).
As of February 2020, paragraph breaks (double-line) are rendered, but not single-line breaks.