Tell them that you had significant burnout but enough savings that you could take a break and renew yourself. No need to include specific medical details and na

Tell them that you had significant burnout but enough savings that you could take a break and renew yourself. No need to include specific medical details and nature of the burnout. Also, start reading and updating your skills immediately. Then you can honestly say that during the down time you have been doing so. They aren't going to ask if you started working on keeping your skills updated from day 1 of your break.