Pin mamba<2 for conda-lock: solution by Ben Mares @maresb

[valeriupredoi]

Our conda lock file generation action is currently failing, the issue is obscure, but I did ask Ben at conda-lock if he's got any ideas, see https://github.com/conda/conda-lock/issues/732 - ~for now I am testing about, see if pinning mamba helps~, and as suggested by @maresb pinning mamba<2 is the correct approach, cheers, Ben! :beer:

~Well, we'll test whenever core conda decides to work again, that is...~

[valeriupredoi]

@maresb Ben, your idea to pin mamba works a treat, very many thanks! I'll leave this one on, and will close your fork PR #3773 but I am naming you here as the man with the idea :bulb: :grin:

[maresb]

Cool, thanks a lot!!! Also it's great to be correct! :joy:

[valeriupredoi]

@bettina-gier perhaps you have minute apply the Seal of Approval here too, please :beer: @schlunma and @bouweandela are royally ignoring conda lock :grin:

[schlunma]

Sorry, been tied up in meetings all day 😩 Will approve once the tests finished 👍

[bettina-gier]

Then I defer to @schlunma, was avoiding this PR cause I got 0 clue about conda-lock =D

[valeriupredoi]

cheers, guys, not a worry, am just being pesky :fly:

[valeriupredoi]

legend! Cheers, chaps :beer: