optional Title in md Head (#442)

Co-authored-by: RT Filefabrik <rt@filefabriik.com>

layouts/docs/single.html

@@ -6,7 +6,7 @@
       <main class="hx-w-full hx-min-w-0 hx-max-w-6xl hx-px-6 hx-pt-4 md:hx-px-12">
         {{ partial "breadcrumb.html" . }}
         <div class="content">
-          <h1>{{ .Title }}</h1>
+          {{ if .Title }}<h1>{{ .Title }}</h1>{{ end }}
           {{ .Content }}
         </div>
         {{ partial "components/last-updated.html" . }}
@@ -15,4 +15,4 @@
       </main>
     </article>
   </div>
-{{ end }}
+{{ end }}