docs($resourceProvider): include '$' in di in example

The injection argument is missing the '$' in the two examples.  The code fails as written.  This change corrects it.

(angular#15099)

Author: sethbattin

src/ngResource/resource.js

@@ -472,7 +472,7 @@ angular.module('ngResource', ['ng']).
      * ```js
      *   angular.
      *     module('myApp').
-     *     config(['resourceProvider', function ($resourceProvider) {
+     *     config(['$resourceProvider', function ($resourceProvider) {
      *       $resourceProvider.defaults.actions.update = {
      *         method: 'PUT'
      *       };
@@ -484,7 +484,7 @@ angular.module('ngResource', ['ng']).
      * ```js
      *   angular.
      *     module('myApp').
-     *     config(['resourceProvider', function ($resourceProvider) {
+     *     config(['$resourceProvider', function ($resourceProvider) {
      *       $resourceProvider.defaults.actions = {
      *         create: {method: 'POST'}
      *         get:    {method: 'GET'},