update templates

templates/landing.html

@@ -3,7 +3,7 @@
     <head>
         <title>Liederwahl</title>
         <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
-        <script src="{{ url_for('static', path='/landing_script.js') }}"></script>
+        <script src="/static/landing_script.js"></script>
     </head>
 
     <body>