build(deps): bump sigstore/cosign-installer from 3.1.1 to 3.1.2 #589

Job	Run time
Build and push image (silverblue, 37, 470)	4m 22s
Build and push image (silverblue, 37, 535)	5m 29s
Build and push image (silverblue, 38, 470)	3m 58s
Build and push image (silverblue, 38, 535)	4m 12s
Build and push image (kinoite, 37, 470)	4m 43s
Build and push image (kinoite, 37, 535)	4m 39s
Build and push image (kinoite, 38, 470)	4m 37s
Build and push image (kinoite, 38, 535)	4m 18s
Build and push image (vauxite, 37, 470)	4m 30s
Build and push image (vauxite, 37, 535)	4m 42s
Build and push image (vauxite, 38, 470)	4m 46s
Build and push image (vauxite, 38, 535)	4m 35s
Build and push image (sericea, 38, 470)	3m 40s
Build and push image (sericea, 38, 535)	3m 54s
Build and push image (base, 37, 470)	4m 2s
Build and push image (base, 37, 535)	4m 30s
Build and push image (base, 38, 470)	3m 28s
Build and push image (base, 38, 535)	4m 27s
Build and push image (lxqt, 37, 470)	4m 0s
Build and push image (lxqt, 37, 535)	4m 37s
Build and push image (lxqt, 38, 470)	4m 11s
Build and push image (lxqt, 38, 535)	3m 48s
Build and push image (mate, 37, 470)	5m 45s
Build and push image (mate, 37, 535)	4m 38s
Build and push image (mate, 38, 470)	3m 58s
Build and push image (mate, 38, 535)	5m 22s
	1h 55m 11s

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