Update to work with double precision build of Godot

[csimpson88]

I am working with a double precision build (Godot 4.2.3 mono). The example project runs, but the initial spectrum (and thus the waves) are not the same as in the single-precision build. Making the following 1-line change solves the issue:

In Ocean3D._pack_initial_spectrum_settings(), change the line that appends the wave vector to pass the wave vector components as 32-bit floats instead of a Vector2. The double precision build of Godot uses 64-bit Vector2, but it makes the correct conversion to 32-bit floats when appending the components to a PackedFloat32Array.
WAS:
settings_bytes.append_array(PackedVector2Array([wave_vector]).to_byte_array())
SHOULD BE:
settings_bytes.append_array(PackedFloat32Array([wave_vector.x, wave_vector.y]).to_byte_array())