build: Bump gjs dependency to 1.68.1
The changes in 58ed969d need gjs 1.68.1 to work, otherwise this results in the background image not getting loaded.
Related #4138 (closed) Related gjs!595 (merged)
The changes in 58ed969d need gjs 1.68.1 to work, otherwise this results in the background image not getting loaded.
Related #4138 (closed) Related gjs!595 (merged)