There was inconsistency in the capitalization of auto unseal in this doc. The initial heading had it right. It shouldn't be capitalized according to the documentation style guidance for feature capitalization. Also, high availability doesn't need to be capitalized.
Change warning to tag syntax so it's clear what should be part of the aside
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Co-authored-by: Sarah Chavis <62406755+schavis@users.noreply.github.com>