[Auto] [Update] Note that tween opacity only works on 2D objects in tween docs (#664)

Co-authored-by: 4ian <1280130+4ian@users.noreply.github.com>

Author: github-actions[bot]

automated_updates_data.json

@@ -1,5 +1,5 @@
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-  "last_automated_updates_commit": "e9b9596d6dddf8fc483ed5d4c2a4725215b073fe",
+  "last_automated_updates_commit": "d52d42d3b4dd16f7cd57727fdd80f721fc0f6f80",
   "last_improved_things": [
     {
       "date": "2026-02-16",

docs/gdevelop5/behaviors/tween/index.md

@@ -9,7 +9,7 @@ The Tween (from inbe**tween**) [behavior](/gdevelop5/behaviors) animates [object
 - Angle (and rotation X/Y for 3D objects)
 - Scale (X, Y, or both)
 - Size (width, height, depth for 3D objects)
-- Opacity
+- Opacity (2D objects only)
 - Color (RGB or HSL modes)
 - Text character size
 - Effect properties (numeric or color parameters)