How to make a Wavy Text shader in Godot in under 3 minutes

Learn how to make wavy text in Godot. Here's the shader code used in the tutorial:
shader_type canvas_item;
uniform float height = 3.0;
uniform float frequency = 20.0;
uniform float speed = 3.0;
void vertex() {
VERTEX.y += height * sin((frequency * UV.x) + (speed * TIME));
}