Take the page heading from the Markdown body, not a separate <h1>

Elternbeirat.Web/Features/Posts/PostDetail.razor

@@ -12,12 +12,9 @@ else if (_post is not null)
         <a href="/posts">&larr; Alle Beiträge</a>
     </nav>
     <article>
-        <header>
-            <h1>@_post.Title</h1>
-            <time class="post-meta" datetime="@_post.Date.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture)">
-                @_post.Date.ToString("d. MMMM yyyy", Cultures.German)
-            </time>
-        </header>
+        <time class="post-meta" datetime="@_post.Date.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture)">
+            @_post.Date.ToString("d. MMMM yyyy", Cultures.German)
+        </time>
         @Body
     </article>
 }