Outdated Parts in Vector Reflection

**Your Godot version:**
4.1

**Issue description:**
The scripts example in the Reflection section is using KinematicCollision2D

**URL to the documentation page:**
https://docs.godotengine.org/en/stable/tutorials/math/vector_math.html#reflection

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and contributing to the class reference here: https://docs.godotengine.org/en/stable/community/contributing/updating_the_class_reference.html