chore: update rusefi-core submodule to latest #21

Job	Run time
generate-matrix	3m 31s
build-firmware (mazduino-mega100-512, boards/mazduino-mega100-512/meta-info.env)	7m 29s
build-firmware (mazduino-compact, boards/mazduino-compact/meta-info.env)	7m 37s
build-firmware (mazduino-mega100, boards/mazduino-mega100/meta-info.env)	7m 33s
build-firmware (mazduino-mini6ch, boards/mazduino-mini6ch/meta-info.env)	7m 41s
build-firmware (mazduino-lite, boards/mazduino-lite/meta-info.env)	7m 16s
	41m 7s

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