Update README.md

Signed-off-by: incisor <[email protected]>

Gems/O3DE/GeomNodes/README.md

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-# GeomNodes
+# GeomNodes
+
+# Supports: Tested on Blender 3.3, Windows 10/11
+
+This gem enables the user to use Blender's Geometry Nodes in O3DE.
+
+![GN-Example-1](https://user-images.githubusercontent.com/874957/225318592-5594db51-335e-4ba4-9b31-943bf0104b97.gif)