docs(readme): temporary link for Vue 3 version

Author: Akryum

README.md

@@ -5,6 +5,8 @@
 
 Blazing fast scrolling of any amount of data | [Live demo](https://akryum.github.io/vue-virtual-scroller/) | [Video demo](https://www.youtube.com/watch?v=Uzq1KQV8f4k)
 
+For Vue 3 support, see [here](https://github.com/Akryum/vue-virtual-scroller/tree/next/packages/vue-virtual-scroller)
+
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