Fix a typo in the Angular plugin docs.
Fix a typo in the Angular plugin docs.

getsentry/raven-js,housinghq/main-raven-js,Mappy/raven-js,Mappy/raven-js,getsentry/raven-js,housinghq/main-raven-js,getsentry/raven-js,getsentry/raven-js,Mappy/raven-js,housinghq/main-raven-js