chore(draw): slightly adjust Association rendering

lib/draw/BpmnRenderer.js

@@ -1095,7 +1095,7 @@ function BpmnRenderer(eventBus, styles, pathMap, priority) {
       var semantic = getSemantic(element);
 
       attrs = assign({
-        strokeDasharray: '1,6',
+        strokeDasharray: '0.5, 5',
         strokeLinecap: 'round',
         strokeLinejoin: 'round'
       }, attrs || {});