Update front-page docs #2900

Job	Run time
gnumake-clang-tidy-native (c++14, g++)	50s
msvc-msbuild (Debug)	1m 39s
gnumake-clang-tidy-native (c++14, clang++)	30s
msvc-msbuild (Release)	1m 11s
target-arm (am335x)	30s
target-arm-cmake (am335x)	33s
target-arm (bcm2835_raspi_b)	41s
target-arm-cmake (bcm2835_raspi_b)	37s
target-arm (lpc11c24)	30s
target-arm-cmake (lpc11c24)	45s
target-arm (nxp_imxrt1062)	47s
target-arm-cmake (nxp_imxrt1062)	36s
target-arm (stm32f100)	39s
target-arm-cmake (stm32f100)	47s
target-arm (stm32f407)	1m 7s
target-arm-cmake (stm32f407)	33s
target-arm (stm32f429)	49s
target-arm-cmake (stm32f429)	43s
target-arm (stm32f446)	45s
target-arm-cmake (stm32f446)	1m 4s
target-arm (stm32h7a3)	35s
target-arm-cmake (stm32h7a3)	1m 4s
target-arm (stm32l100c)	45s
target-arm-cmake (stm32l100c)	29s
target-arm (stm32l152)	1m 6s
target-arm-cmake (stm32l152)	1m 19s
target-arm-macos (am335x)	53s
target-avr (avr)	18s
target-arm-macos (bcm2835_raspi_b)	1m 26s
target-avr (atmega2560)	41s
target-arm-macos (lpc11c24)	56s
target-arm-macos (nxp_imxrt1062)	51s
target-arm-macos (stm32f100)	1m 9s
target-arm-macos (stm32f407)	1m 19s
target-avr-cmake (avr)	43s
target-arm-macos (stm32f429)	1m 29s
target-host-cmake	13s
target-riscvfe310 (riscvfe310)	1m 23s
target-avr-cmake (atmega2560)	20s
target-arm-macos (stm32f446)	1m 27s
target-arm-macos (stm32h7a3)	51s
target-x86_64	19s
target-arm-macos (stm32l100c)	1m 8s
target-avr-macos (avr)	55s
target-arm-macos (stm32l152)	58s
target-avr-macos (atmega2560)	43s
	38m 56s

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