CompatHelper: bump compat for Functors to 0.4 for package LuxCore, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the Functors package from 0.2, 0.3 to 0.2, 0.3, 0.4 for package LuxCore.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov]

Codecov Report

Base: 86.63% // Head: 86.63% // No change to project coverage 👍

Coverage data is based on head (05090d5) compared to base (be92467).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #203   +/-   ##
=======================================
  Coverage   86.63%   86.63%           
=======================================
  Files          36       36           
  Lines        1961     1961           
=======================================
  Hits         1699     1699           
  Misses        262      262           

Flag	Coverage Δ
Boltz	97.36% <ø> (ø)
Flux2Lux	79.14% <ø> (ø)
Lux	89.33% <ø> (ø)
LuxCore	44.44% <ø> (ø)
LuxLib	78.84% <ø> (ø)

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