docs(style-guide): 03-02 pluralize villain

closes #1479

Author: Foxandxss

public/docs/_examples/style-guide/ts/03-02/app/app.component.ts

@@ -1,6 +1,6 @@
 import { Component } from '@angular/core';
 
-import { HEROES_URL, VILLAIN_URL } from './shared/data.service';
+import { HEROES_URL, VILLAINS_URL } from './shared/data.service';
 
 @Component({
   selector: 'sg-app',
@@ -11,5 +11,5 @@ import { HEROES_URL, VILLAIN_URL } from './shared/data.service';
 })
 export class AppComponent {
   heroesUrl = HEROES_URL;
-  villainsUrl = VILLAIN_URL;
+  villainsUrl = VILLAINS_URL;
 }

public/docs/_examples/style-guide/ts/03-02/app/shared/data.service.ts

@@ -1,5 +1,5 @@
 // #docregion
 // #docregion example
 export const HEROES_URL = 'api/heroes';
-export const VILLAIN_URL = 'api/villains';
+export const VILLAINS_URL = 'api/villains';
 // #enddocregion example