added 'about' section

template-index.html

@@ -11,9 +11,12 @@
     <nav>
         {{language-switcher}}
     </nav>
-    <h1>{{introduction-heading}}</h1>
-    <p>{{introduction-subheading}}</p>
-    <h2>{{why-heading}}</h2>
+    <header id="about">
+        <h1>{{introduction-heading}}</h1>
+        <p>{{introduction-subheading}}</p>
+    </header>
+    <p>{{about-paragraph}}</p>
+    <h2 id="why">{{why-heading}}</h2>
     <p>{{why-paragraph}}</p>
 </body>