Rosemary showing brown spots

Hello from a new gardener in NSW!

I reported this Rosmary about a week ago into a general potting mix with a little fertiliser. I noticed some of these brown spots and clipped off the impacted leaves I could see about three days ago.

Either I’ve missed these leaves or it’s getting worse still, does anyone know what it might be and how to help the Rosemary get rid of it?