docs(ngController): Fix priority value mentioned in the docs
docs(ngController): Fix priority value mentioned in the docs

The `@priority 500` part was missing from the ngDoc comment, thus the docs mentioned a priority of 0
(instead of the correct 500).

Closes #9070

ggershoni/angular.js,ggershoni/angular.js,ggershoni/angular.js,ggershoni/angular.js