Update reference for McSw15

[jesusff]

I have seen that the final version of the Palmer et al. in now published in ESD
https://esd.copernicus.org/articles/14/457/2023/esd-14-457-2023.pdf
good to add the final ref in the yaml files for the CMIP6 GCM selection
Carol, could be good also to check that the yaml file is still in agreement with the final version of the paper
cheers
sam

I assume this refers to McSw15, which was used as reference for a new analysis for CMIP6 following the same methodology. We need to make sure that the methodology is exactly the same as described in the yaml file.

[sam-somot]

I have started to create the Palmer23.yaml file to implement the scores computed in this paper. The method and results are not exactly the same. For example, only 3 categories and not 4. My advise is therefore to finalize the yaml file based on Palmer23 and to disable McSw15. By the way, I have done it for MED domain already. Interestingly, Palmer et al. compute a score based on cyclone tracks that can be relevant for EUR as well