[BUGFIX] Fix deprecation notice in api.typo3.org (#652)

Resolves #648

Author: linawolf

packages/typo3-api/template/components/deprecation.html.twig

@@ -0,0 +1,10 @@
+{% if node.deprecated %}
+    {% for deprecation in node.deprecations %}
+        <div class="phpdocumentor-admonition">
+        <svg class="phpdocumentor-admonition__icon" fill="none" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z"></path></svg>
+            <article>
+                <strong>Deprecated</strong> {{ deprecation.description|description|markdown}}
+            </article>
+        </div>
+    {% endfor %}
+{% endif %}