Blimp: update PID logger documentation #1146

Job	Run time
build (stm32f7, chibios, 10)	12m 41s
build (stm32h7, chibios, 10)	16m 49s
build (fmuv2-plane, chibios, 10)	5m 40s
build (periph-build, chibios, 10)	10m 50s
build (iofirmware, chibios, 10)	2m 12s
build (CubeOrange-bootloader, chibios, 10)	1m 4s
build (fmuv3-bootloader, chibios, 10)	1m 16s
build (revo-bootloader, chibios, 10)	1m 22s
build (stm32h7-debug, chibios, 10)	7m 38s
build (fmuv3, chibios, 10)	13m 22s
build (revo-mini, chibios, 10)	11m 24s
build (MatekF405-Wing, chibios, 10)	13m 27s
build (CubeOrange-ODID, chibios, 10)	7m 44s
build (CubeRedPrimary-bootloader, chibios, 10)	1m 11s
build (configure-all, chibios, 10)	11m 46s
build (build-options-defaults-test, chibios, 10)	22m 43s
build (signing, chibios, 10)	8m 33s
	2h 29m 42s

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