Fix static path in documentation

opendrift_leeway_webgui/leeway/templates/leeway/leewaysimulation_documentation.html

@@ -154,7 +154,7 @@ <h3>Example</h3>
     <p>
         When you reach that position, you need to define a course to the next largest cluster that at the same time covers as many drift positions as possible. You choose position 39° 29' N 18° 39' E as you next and final waypoint. To reach that last waypoint, you set course to 070.
     </p>
-    <img src="{% static 'leeway/static/image/84eed031-ed5b-4802-a0e9-580b5fd9b93f.png' %}"
+    <img src="{% static 'image/84eed031-ed5b-4802-a0e9-580b5fd9b93f.png' %}"
          alt="Simulation result example"
          width="800"
          height="800">