Hey there ButterStotch, as you're growing outdoors this kind of "unexplainable" spots will pop . basically its tiny bug bites, you can tell by how they're clustered together. As this isnt really a big deal yet, there's not much you can do, these mysterious bite marks comme and go. If you want you can always add bacilus thungerensis (BT) which should control any potential outbreak. Meanwhile do check your plant up and down, especially under the leaves and the area near the pot. You're looking for aphids or spider mites which will appear as microscopic black dots. If you do find any, i recommend the BT but if not, well welcome to the wonderful world of cultivating outside ! đ