Google Chrome dmg wont eject after installation, even though it's not in use

I just bought a MacBook Air M1 (it's my first MacBook so im pretty new to the OS). I downloaded and installed Google chrome, however I'm trying to delete the dmg file but when I click eject or try to delete the file manually it says that is being used by Google Chrome and cannot be deleted, but I've closed google chrome already. Any suggestions to what might be happening? Thanks! (also excuse my English, not my first language)