Welcome!! Congrats on your new addition and good on ya for adopting
IF the noises are all the time (i.e. every breath) I'd get thee to a vet as soon as possible. If it's intermittent (like when resting, so may be a snore) this could just be you getting to know your bunny and noticing things like snoring. Really depends on when you hear the noise and if it's definitely new or just something your noticing. Any chance you can post a video?