fix: Add missing quotes to dconf string value. #1892

Job	Run time
Make (main, bluefin, 38)	4m 46s
Make (main, bluefin, 39)	5m 53s
Make (main, bluefin-dx, 38)	8m 50s
Make (main, bluefin-dx, 39)	9m 48s
Make (nvidia, bluefin, 38)	6m 4s
Make (nvidia, bluefin, 39)	6m 30s
Make (nvidia, bluefin-dx, 38)	9m 40s
Make (nvidia, bluefin-dx, 39)	8m 49s
Make (asus, bluefin, 38)	4m 53s
Make (asus, bluefin, 39)	7m 45s
Make (asus, bluefin-dx, 38)	9m 13s
Make (asus, bluefin-dx, 39)	10m 36s
Make (asus-nvidia, bluefin, 38)	5m 30s
Make (asus-nvidia, bluefin, 39)	6m 16s
Make (asus-nvidia, bluefin-dx, 38)	11m 14s
Make (asus-nvidia, bluefin-dx, 39)	9m 29s
Make (framework, bluefin, 38)	5m 37s
Make (framework, bluefin, 39)	7m 32s
Make (framework, bluefin-dx, 38)	8m 49s
Make (framework, bluefin-dx, 39)	11m 40s
Make (surface, bluefin, 38)	7m 58s
Make (surface, bluefin, 39)	12m 7s
Make (surface, bluefin-dx, 38)	8m 55s
Make (surface, bluefin-dx, 39)	9m 57s
Make (surface-nvidia, bluefin, 38)	6m 30s
Make (surface-nvidia, bluefin, 39)	6m 38s
Make (surface-nvidia, bluefin-dx, 38)	10m 54s
Make (surface-nvidia, bluefin-dx, 39)	10m 7s
Check all builds successful	1s
	3h 52m 1s

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