It's very common to edit your typo but still leave it there either crossed out, and/or leave an EDIT: and explain what/why you changed it. It's perfectly okay

It's very common to edit your typo but still leave it there either crossed out, and/or leave an EDIT: and explain what/why you changed it. It's perfectly okay to ensure your text is communicating accurate information - in fact leaving it may undermine your explanation as certain folks will focus on the error (or others won't notice it and learn something incorrect).