Add header tag to page header

layouts/partials/paige/page-header.html

@@ -12,7 +12,7 @@
 {{ $textkeywords := eq ($page.Param "paige.keyword_style" | default "text") "text" }}
 {{ $title := $page.Title | markdownify }}
 
-<div class="mw-100" id="paige-metadata">
+<header class="mw-100 align-items-center d-flex flex-column" id="paige-page-header">
     {{ with $title }}
         <h1 class="fw-bold text-center" id="paige-title">{{ if $link }}<a href="{{ $link }}">{{ . }}</a>{{ else }}{{ . }}{{ end }}</h1>
     {{ end }}
@@ -70,7 +70,6 @@
             {{ end }}
         </div>
     {{ end }}
-</div>
 
     {{ with $page.Param "paige.alert" }}
         <div class="alert alert-{{ .type }}" role="alert">{{ .message | markdownify }}</div>
@@ -83,3 +82,4 @@
             </div>
         </div>
     {{ end }}
+</header>