Blimp: Fix some typos #2865

Job	Run time
build (stm32f7, chibios, 10)	6m 44s
build (stm32h7, chibios, 10)	5m 11s
build (fmuv2-plane, chibios, 10)	3m 20s
build (periph-build, chibios, 10)	8m 36s
build (iofirmware, chibios, 10)	2m 49s
build (CubeOrange-bootloader, chibios, 10)	1m 6s
build (fmuv3-bootloader, chibios, 10)	1m 5s
build (revo-bootloader, chibios, 10)	1m 29s
build (stm32h7-debug, chibios, 10)	3m 44s
build (fmuv3, chibios, 10)	9m 6s
build (revo-mini, chibios, 10)	5m 49s
build (MatekF405-Wing, chibios, 10)	6m 25s
build (CubeOrange-ODID, chibios, 10)	3m 29s
build (CubeRedPrimary-bootloader, chibios, 10)	1m 25s
build (configure-all, chibios, 10)	10m 35s
build (build-options-defaults-test, chibios, 10)	12m 36s
build (signing, chibios, 10)	4m 3s
	1h 27m 32s

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