CanvasLayer documentation outdated/incorrect.

**Your Godot version:** 4.1.1

**Issue description:** The documentation says: "Note: Embedded Windows are placed on layer 1024. CanvasItems on layers 1025 and higher appear in front of embedded windows." However, CanvasLayers seemed to be limited to the range of (-128, 128). Given that, what layer are embedded windows displayed at?

Additionally, the _type_ of the Layer property is listed as "int" which links to a page describing a signed 64-bit integer type.

**URL to the documentation page:** https://docs.godotengine.org/en/stable/classes/class_canvaslayer.html