Change the warning in the readme to a more general one.

[egavazzi]

The segmentation fault issue seems to be back on Linux with a recent update of matlab (see https://github.com/JuliaInterop/MATLAB.jl/pull/215#issuecomment-2001254293), but at the same time gone from macOS (see https://github.com/JuliaInterop/MATLAB.jl/issues/223). As the problem seems to come and go with updates (but always works with versions pre R2022), I propose a more general warning message.