changed single asterisks to double asterisks for ticket #60513

[rudlinkon]

This is an additional change of PR#6132

Trac ticket: https://core.trac.wordpress.org/ticket/60513

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[github-actions]

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Props mahnewr, rudlinkon.

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[github-actions]

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[swissspidy]

Fixed in https://core.trac.wordpress.org/changeset/57665