Magento 2.3.6 How to bulk change category names

I have dozens of categories, each category is the name of a rock band (i.e. AC/DC) and I want to add the words “Drum Sheet Music” to the end of each category name, so AC/DC would become “AC/DC Drum Sheet Music”.

I know there are extensions that will do that, but most are very expensive and also I don’t want to add yet another extension.

I tried exporting a CSV file, then change all the category names and then importing the file, but this does not work.

Does anyone know how I can do this?