Update field-guides.json
Update field-guides.json

Fixed a typo in languages section of field guides.
HKuz/FreeCodeCamp,raisedadead/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,jonathanihm/freeCodeCamp,otavioarc/freeCodeCamp,HKuz/FreeCodeCamp,pahosler/freecodecamp,BhaveshSGupta/FreeCodeCamp,FreeCodeCamp/FreeCodeCamp,pahosler/freecodecamp,BhaveshSGupta/FreeCodeCamp,raisedadead/FreeCodeCamp,BhaveshSGupta/FreeCodeCamp,otavioarc/freeCodeCamp,jonathanihm/freeCodeCamp