refactor(challenges): Added Integrity and crossorigin attributes
refactor(challenges): Added Integrity and crossorigin attributes

best practice

BREAKING CHANGE: N/A

jonathanihm/freeCodeCamp,BhaveshSGupta/FreeCodeCamp,pahosler/freecodecamp,jonathanihm/freeCodeCamp,raisedadead/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,pahosler/freecodecamp,otavioarc/freeCodeCamp,HKuz/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,HKuz/FreeCodeCamp,otavioarc/freeCodeCamp,raisedadead/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp