west.yml: update Zephyr to 26002b060708 #15474

Job	Run time
LP64-WIP	3m 16s
build-windows (imx8 imx8x imx8m)	8m 36s
build-linux (mnfst, imx8 imx8x imx8m)	5m 44s
build-windows (mtl)	9m 41s
build-linux (mnfst, mtl)	6m 8s
build-windows (tgl tgl-h)	7m 53s
manifest-check	57s
build-linux (mnfst, lnl)	4m 28s
build-windows (-d, mtl)	6m 28s
build-linux (mnfst, tgl tgl-h)	8m 3s
build-linux (zmain, imx8 imx8x imx8m)	5m 36s
build-linux (zmain, mtl)	4m 2s
build-linux (zmain, lnl)	6m 49s
build-linux (zmain, tgl tgl-h)	5m 8s
build-linux (-d, mnfst, mtl)	4m 0s
compare-linux-win	1m 12s
	1h 28m 1s

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