Issue 3744 - Fixes capitlization of uses of Tos and Faq to TOS and FAQ

Simple, but effective.

Shouldn't effect work titles, should effect future pages created.
Can't make edge case guarantees, for example - if AO3 decided it would be a great idea to include a new search feature called "Fruc-Tose  Searcher" (Fructose would be fine) then it will make it "Fruc-TOSe Searcher" but seriously the odds of running into these is just too small to be of concern.