Add data-pagefind-body to main content element

In preparation for adding Pagefind search support to bbaovanc.com. Those
templates will just go in the bbaovanc.com tree instead.

layouts/_partials/seo-tags/opengraph.html

@@ -33,7 +33,7 @@
     <meta property="og:locale" content="{{ . }}">
 {{ end }}
 
-{{ with .Site.Params.title }}
+{{ with .Site.Title }}
     <meta property="og:site_name" content="{{ . }}">
 {{ end }}
 

layouts/baseof.html

@@ -19,7 +19,7 @@
                 {{ partial "breadcrumb.html" . }}
             {{ end }}
 
-            <main id="main-content">
+            <main id="main-content" data-pagefind-body>
                 {{ block "main" . }}
                     THIS TEXT SHOULD NOT SHOW. YUZSIQGHE (that string is so I can grep for it)
                 {{ end }}