AP_Periph: release notes for 1.8.0 #44942

Job	Run time
build (stm32f7, chibios, 10)	13m 36s
build (stm32h7, chibios, 10)	12m 35s
build (fmuv2-plane, chibios, 10)	5m 27s
build (periph-build, chibios, 10)	3m 52s
build (iofirmware, chibios, 10)	2m 40s
build (CubeOrange-bootloader, chibios, 10)	1m 11s
build (fmuv3-bootloader, chibios, 10)	1m 25s
build (revo-bootloader, chibios, 10)	1m 9s
build (stm32h7-debug, chibios, 10)	6m 59s
build (fmuv3, chibios, 10)	5m 45s
build (revo-mini, chibios, 10)	10m 36s
build (MatekF405-Wing, chibios, 10)	11m 14s
build (CubeOrange-ODID, chibios, 10)	8m 28s
build (CubeRedPrimary-bootloader, chibios, 10)	1m 26s
build (configure-all, chibios, 10)	10m 48s
build (build-options-defaults-test, chibios, 10)	23m 23s
build (signing, chibios, 10)	9m 21s
build (CubeOrange-PPP, chibios, 10)	6m 38s
build (CubeRed-EKF2, chibios, 10)	6m 55s
build (SOHW, chibios, 10)	3m 24s
build (Pixhawk6X-PPPGW, chibios, 10)	1m 11s
build (new-check, chibios, 10)	4m 21s
	2h 32m 24s

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