fix: compat for r154 shader chunk renames

[alexzhang1030]

Why

Threejs has been renamed encodings_fragment to colorspace_fragment since r154.

This will fix the warning:

THREE.WebGLRenderer: Shader chunk "encodings_fragment" has been deprecated. Use "colorspace_fragment" instead.

What

Check the version of three.js and choose the right shader chunks.

Checklist

• [ ] Documentation updated
• [x] Ready to be merged

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:tada: This PR is included in version 1.9.8 :tada:

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