Fix element_tree image relative path

Author: Fernando-A-Rocha

web/src/pages/Element_tree.mdx

@@ -1,6 +1,6 @@
 import StarlightPage from '@astrojs/starlight/components/StarlightPage.astro';
 import { Image } from 'astro:assets';
-import treeImage from '../assets/element_tree.webp';
+import treeImage from '../../../assets/element_tree.webp';
 
 <StarlightPage frontmatter={{
     template: 'doc',