Update PageTitle component to use div

Changed header element to div to fix accessiblity violation of
having multiple header elements without unique aria-label properties.

Signed-off-by: Yoshie Muranaka <yoshiemuranaka@gmail.com>
Change-Id: I1e8aeaa6ee9142e16176eb47928916424ef4fba0
diff --git a/src/components/Global/PageTitle.vue b/src/components/Global/PageTitle.vue
index 26588ca..5c64f0d 100644
--- a/src/components/Global/PageTitle.vue
+++ b/src/components/Global/PageTitle.vue
@@ -1,8 +1,8 @@
 <template>
-  <header class="page-title">
+  <div class="page-title">
     <h1>{{ title }}</h1>
     <p v-if="description">{{ description }}</p>
-  </header>
+  </div>
 </template>
 
 <script>