bug#69667: build of sway-1.9-checkout.drv failed

[Isaac van Bakel]

grimshot was removed from the sway repo[0] and moved to a standalone 
user-contributions repo[1]. This build failure is visible in CI. It is 
possible to use grimshot from the new repository, if you delete the 
'chdir phase.

wlgreet seems to have a known issue with sway 1.9[2] that causes the 
startup failure, though this should go in a separate issue, since it's 
unrelated to the checkout error which is linked to grimshot.

 0: https://github.com/swaywm/sway/issues/7405
 1: https://github.com/OctopusET/sway-contrib
 2: 
https://git.sr.ht/~kennylevinsen/wlgreet/commit/7e79d6004fc5e765a5c3ece6d377f8c5999d9dfa