Soaring popularity of the ESMValCore package

[valeriupredoi]

I'd like to bring to your attention the soaring popularity of the ESMValCore package as reflected by the number of downloads of the 2.5.0 stable from conda-forge, see it on conda-forge - 2.5 was downloaded almost twice as many times as 2.4 - yes, a number of those downloads are automated CI ones, but given that the number of CI tests has not changed drastically from 2.4 to 2.5 (about 150 per month for the nightly GA tests, and another 100 odd for the nightly Circle, to which we can add the ones ran on various PRs merged - about 15-20 merged PRs per month in Core and another 20 odd PRs from Tool - very roughly about 3000 downloads from CI's), one can only assume the other many thousands are users, or, to the very least nightly CI's of users that use the package in their environments. By comparison, iris' last stable that was released about around the same time as our 2.5 is twice as downloaded - but iris is definitely a very popular package, and the fact we're at 50% their number of downloads is encouraging! Well done @ESMValGroup/technical-lead-development-team and all the others who contribute to the Core 🍺 🍺