feat(style): modify root font-size for more consistent design

templates/page/index.gohtml

@@ -5,7 +5,7 @@
                 <img src="{{ getImage .Person.Image }}" alt="{{ .Person.Name }}'s image">
             </figure>
             <div class="presentation__information">
-                <h2>{{ .Person.Name }}</h2>
+                <h1>{{ .Person.Name }}</h1>
                 <p>{{ .Person.Pronouns }}</p>
             </div>
         </div>