fix broken dom-structure image

Author: asabaylus

README.md

@@ -175,7 +175,7 @@ const commands = [{
 
   The following picture illustrates how `theme` keys correspond to CommandPalette DOM structure:
 
-  ![DOM structure](./docs/images/dom-structure.png)
+  ![DOM structure](./images/dom-structure.png)
 
 ```trigger``` a _string_ or a _React.ComponentType_ the opens the command palette when clicked. If a custom trigger is not set then by default a button will be used. If a custom component or string is provided then it will automatically be wrapped inside an accessible div that will allow it be keyboard accessible, clickable and focusable for assistive technologies.