You're a stronger person than me, I'd probably write her something passive aggressively including both words spelt correctly to see if she noticedI have an acquaintance who has ‘grammar police’ in their social media bios but then misspelt the word ‘leisure’ on a wedding invite and used the word ‘dependant’ to describe something being weather-dependent.
I am DYING to point out her errors (we haven’t always been on great terms) but I will take the high road and smirk to myself instead. Because I do not purport to be the ‘grammar police’.