The problem of patent revision!

It doesn't matter if the instructions are misspelled. I'm sure it's okay. This is a trivial matter. Examiners may not point out this problem when they see it. Not to mention that the average examiner won't look so carefully. Even if the examiner really sees it, he will definitely give you another chance to revise it. If you are still not at ease, call the examiner and tell him, "I want to submit another supplement, please don't pass the preliminary examination or please don't authorize me." But the truth is, it doesn't matter whether you change it or not. Anyway, it's a typo, and it doesn't matter much.