docs: added favicon

Author: AnkitSharma-007

projects/bulma-app/src/assets/images/favicon.png

@@ -5,7 +5,7 @@
     <title>ngx2-bulma: Bulma components, powered by Angular</title>
     <base href="/" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <link rel="icon" type="image/x-icon" href="favicon.ico" />
+    <link rel="icon" type="image/x-icon" href="assets/images/favicon.png" />
     <link
       rel="stylesheet"
       href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.9.0/css/bulma.min.css"