Update content.json
Update content.json

Added 'Erase All Kittens' entities to "make" and "teach" sections of CodingScripting
alicoding/webmaker.org,alicoding/webmaker.org,cadecairos/webmaker.org,mozilla/webmaker.org,mmmavis/webmaker.org,mmmavis/webmaker.org,cadecairos/webmaker.org,mozilla/webmaker.org