fix typo in filename

public/projekte/urlkuerzer2.html

@@ -41,7 +41,7 @@
     </p>
     Aktueller build Status: <img src="http://gitlab.jonasled.de/jonasled/url_shorter_docker/badges/master/pipeline.svg"><br>
     <img src="/img/projekte/kurz_ml_light.png">
-    <img src="/img/projekte/kurz_ml_ldark.jpg">
+    <img src="/img/projekte/kurz_ml_dark.jpg">
     <h2>Kommentare:</h2>
     <jl-comments_display></jl-comments_display>
     <jl-new_comment id="newComment"></jl-new_comment>