Update tool.html

_includes/tool.html

-<h3>{{tool.name}}</h3>
+<h3 id="{{tool.uid}}">{{tool.name}}</h3>
 <p> {{tool.content}}</p>
 {% if tool.imagetag %} {% include {{site.gallery}} topic=tool.imagetag %} {% endif %}
 {% if tool.wikilink %}<p>Mehr infos findest du im <a href="{{tool.wikilink}}">Wiki</a>.<p>{% endif %}