It doesn't look like bud rot. The leaf looks like minor nutrient deficiency if any. Don't mess with the buds they will be stacking and fattening up over the next couple of weeks. Let her grow 🍀👍
Hard to see if it is bud rot, try to pull a bud leave near the brown spot and see if it plugs off easily. If it does, check the stem of the bud leave and look for any mold.