sof-ctl: minor update for help text #15887

Job	Run time
build-windows (imx8 imx8x imx8m)	6m 40s
build-linux (mnfst, imx8 imx8x imx8m)	4m 15s
LP64-WIP	3m 18s
build-linux (mnfst, mtl)	3m 58s
build-linux (mnfst, lnl)	4m 9s
build-windows (mtl)	6m 19s
manifest-check	42s
build-linux (mnfst, tgl tgl-h)	5m 27s
build-windows (tgl tgl-h)	6m 49s
build-linux (zmain, imx8 imx8x imx8m)	4m 17s
build-windows (-d, mtl)	6m 47s
build-linux (zmain, mtl)	3m 55s
build-linux (zmain, lnl)	4m 6s
build-linux (zmain, tgl tgl-h)	4m 47s
build-linux (-d, mnfst, mtl)	4m 21s
compare-linux-win	24s
	1h 10m 14s

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