Incorrect golden solution for ctf 15

[JamesLee-Jones]

The current solution for ctf 15 in ic_ctf.json is picoCTF{1|/|_4_p34|\|ut_f3bc410e} (omitting escape characters). However, following the solution results in the flag picoCTF{1|\/|_4_p34|\|ut_f3bc410e} (again omitting escape characters). The golden solution for task 15 should therefore be updated to picoCTF{1|\\\/|_4_p34|\\|ut_f3bc410e}.