Increased ESMValCore version to 2.5.0rc3

[schlunma]

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[codecov]

Codecov Report

Merging #1504 (5b9b467) into main (4117064) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1504   +/-   ##
=======================================
  Coverage   90.74%   90.74%           
=======================================
  Files         197      197           
  Lines       10547    10547           
=======================================
  Hits         9571     9571           
  Misses        976      976           

Impacted Files	Coverage Δ
esmvalcore/_version.py	100.00% <100.00%> (ø)

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[remi-kazeroni]

Looks good to me, thanks @schlunma!