CompatHelper: bump compat for Functors in [weakdeps] to 0.5 for package LuxCore, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the Functors package from 0.4.12 to 0.4.12, 0.5 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.

[github-actions]

Benchmark Results (ASV)

	main	29b38d6...	main/29b38d6c5a10dc...
basics/overhead	0.121 ± 0.00084 μs	0.121 ± 0.00087 μs	0.997
time_to_load	1.15 ± 0.0036 s	1.15 ± 0.0024 s	0.998

Benchmark Plots

A plot of the benchmark results have been uploaded as an artifact to the workflow run for this PR.
Go to "Actions"->"Benchmark a pull request"->[the most recent run]->"Artifacts" (at the bottom).