.github: upgrade configure-aws-credentials to v4 #946

Job	Run time
build (stm32f7, chibios, 10)	27m 48s
build (stm32h7, chibios, 10)	24m 4s
build (fmuv2-plane, chibios, 10)	10m 38s
build (periph-build, chibios, 10)	36m 36s
build (iofirmware, chibios, 10)	4m 9s
build (CubeOrange-bootloader, chibios, 10)	1m 54s
build (fmuv3-bootloader, chibios, 10)	1m 31s
build (revo-bootloader, chibios, 10)	1m 47s
build (stm32h7-debug, chibios, 10)	12m 54s
build (fmuv3, chibios, 10)	25m 0s
build (revo-mini, chibios, 10)	19m 17s
build (MatekF405-Wing, chibios, 10)	21m 21s
build (CubeOrange-ODID, chibios, 10)	15m 34s
build (CubeRedPrimary-bootloader, chibios, 10)	1m 36s
build (configure-all, chibios, 10)	10m 0s
build (build-options-defaults-test, chibios, 10)	37m 53s
build (signing, chibios, 10)	18m 17s
build (CubeOrange-PPP, chibios, 10)	12m 40s
build (CubeOrange-SOHW, chibios, 10)	12m 58s
build (Pixhawk6X-PPPGW, chibios, 10)	5m 55s
	5h 1m 52s

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