Replace "sensible" with "sensitive" when describing information like passwords.

[Leftium]

sensitive: needing to be treated with care or secrecy

[rwieruch]

Every day something new for me to learn about the English language :-) Thank you! If you find the word in the book, you can open a Pull Request here to replace it with sensitive. Otherwise I leave the Issue open and do it myself for the next edition! Thanks again.