Update release version for v2.12.0

[sloosvel]

Description

This PR updates the CITATION.cff to version 2.12.0, as well as fixing the release notes

Link to documentation: https://esmvaltool--2678.org.readthedocs.build/projects/ESMValCore/en/2678/changelog.html

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.08%. Comparing base (ad39a99) to head (137d0d7).
Report is 50 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2678   +/-   ##
=======================================
  Coverage   95.08%   95.08%           
=======================================
  Files         255      255           
  Lines       14921    14921           
=======================================
  Hits        14188    14188           
  Misses        733      733           

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[bettina-gier]

looks good to me

[valeriupredoi]

CITACION es bueno 🇪🇸 😁
Did you want to add the highlights that @bouweandela suggested (in the discussion item, I believe)?

[sloosvel]

I totally missed the highlights by @bouweandela ! I'll add them now.

[schlunma]

Would it be possible to list "Merge configuration object from multiple files (instead of one single file)" under "deprecations"? I know that there's a very small backwards-incompatible change in there, but for most parts it's just a deprecation.

[sloosvel]

Would it be possible to list "Merge configuration object from multiple files (instead of one single file)" under "deprecations"? I know that there's a very small backwards-incompatible change in there, but for most parts it's just a deprecation.

Done in b4f702b

[sloosvel]

Also if @bouweandela and @schlunma want to add a way to deal with the backwards incompatible changes let me know. I was under the impression they were "automatic" but maybe you want to add further comments.

[schlunma]

Here are some details:

• Make derivation of total column ozone (toz) more flexible and add derivation of stratospheric and tropospheric column ozone: The units of the custom variable toz have been changed from "DU" to "m" to be consistent with the CMIP6 table. Details and instructions to adapt existing code can be found here.
• Merge configuration object from multiple files (instead of one single file): The configuration object is now merged from multiple configuration files. The single user configuration file config-user.yml has been deprecated. Details and instructions to adapt existing code can be found here.
• Remove deprecated CMOR fix/check code: CMOR fixes and checks have been clearly separated in v2.10.0. The old deprecated code has now been removed. Details and instructions to adapt existing code can be found here.
• Remove deprecated statistical operators: Old statistical operators that have been deprecated in v2.10.0 have now been removed. Details and instructions to adapt existing code can be found here.
• Make Dask configurable in our configuration: Dask is now configurable via the configuration object. The old Dask configuration file that needed to be located at ~/.esmvaltool/dask.yml is now deprecated. Details and instructions to adapt existing code can be found here.

[bouweandela]

Also if @bouweandela and @schlunma want to add a way to deal with the backwards incompatible changes let me know. I was under the impression they were "automatic" but maybe you want to add further comments.

Unfortunately not, they need to be hand written.

[bouweandela]

Thanks!