Merge pull request #2907 from abulka/vue3-renderCB

updated demo index page to include vue3 renderCB demo

Author: adumesny

demo/index.html

@@ -38,6 +38,7 @@ <h1>Demos</h1>
     <li><a href="vue3js_dynamic-render_grid-item-content.html">Vue3: Gridstack Controls Vue Rendering Grid Item Content</a></li>
     <li><a href="vue3js_dynamic-render_grid-item.html">Vue3: Gridstack Controls Vue Rendering Grid Item</a></li>
     <li><a href="vue3js_v-for.html">Vue3 with v-for</a></li>
+    <li><a href="vue3js_dynamic-modern-renderCB.html">Vue3: Render GridStack item content using GridStack.renderCB</a></li>
     <li><a href="web-comp.html">Web Component</a></li>
     <li><a href="web1.html">Website demo 1</a></li>
     <li><a href="web2.html">Website demo 2</a></li>