docs($templateCache): fix typo (template --> templateCache)

Author: gkalpak

src/ng/cacheFactory.js

@@ -388,11 +388,11 @@ function $CacheFactoryProvider() {
  * To retrieve the template later, simply use it in your component:
  * ```js
  * myApp.component('myComponent', {
- *    template: 'templateId.html'
+ *    templateUrl: 'templateId.html'
  * });
  * ```
  *
- * or get it via $templateCache service:
+ * or get it via the `$templateCache` service:
  * ```js
  * $templateCache.get('templateId.html')
  * ```