west.yml: update zephyr to 7fa8bf17563 #19503

Job	Run time
LP64-WIP	3m 45s
build-windows (imx8 imx8x imx8m imx8ulp)	7m 53s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	5m 51s
build-windows (mtl)	6m 12s
build-linux (mnfst, mtl)	4m 26s
build-windows (tgl tgl-h)	6m 7s
manifest-check	47s
build-linux (mnfst, lnl)	4m 16s
build-windows (-d, mtl)	6m 30s
build-linux (mnfst, tgl tgl-h)	5m 11s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	5m 48s
build-linux (zmain, mtl)	4m 42s
build-linux (zmain, lnl)	4m 9s
build-linux (zmain, tgl tgl-h)	5m 27s
build-linux (-d, mnfst, mtl)	4m 26s
build-linux (mnfst, --all)	12m 2s
compare-linux-win	23s
	1h 27m 55s

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