Fixing minor typo on `raise` in README
Fixing minor typo on `raise` in README

Changing `raise` to `raised` in the "behind the scenes" list.
ABaldwinHunter/scientist-classic,kachick/scientist,github/scientist,ABaldwinHunter/scientist-engines,kachick/scientist,ABaldwinHunter/scientist-engines,ABaldwinHunter/scientist-classic,github/scientist