bump feather 833 SD to 7.3.0 #531

Job	Run time
set-matrix	3s
build (adm_b_nrf52840_1)	38s
build (ae_bl652_bo)	21s
build (aramcon2_badge)	29s
build (aramcon_badge_2019)	28s
build (arcade_feather_nrf52840_express)	20s
build (arduino_nano_33_ble)	28s
build (bast_ble)	33s
build (bluemicro_nrf52833)	22s
build (bluemicro_nrf52840)	27s
build (challenger_840_ble)	19s
build (circuitplayground_nrf52840)	20s
build (clue_nrf52840)	25s
build (ebyte_e104_bt5032a)	21s
build (ebyte_e73_tbb)	22s
build (electronut_labs_papyr)	24s
build (feather_nrf52832)	34s
build (feather_nrf52833_express)	21s
build (feather_nrf52840_express)	29s
build (feather_nrf52840_sense)	30s
build (feather_nrf52840_sense_tft)	24s
build (ikigaisense_vita)	30s
build (itsybitsy_nrf52840_express)	21s
build (ledglasses_nrf52840)	26s
build (m60_keyboard)	22s
build (mdk_nrf52840_dongle)	28s
build (metro_nrf52840_express)	20s
build (mikoto)	28s
build (nRF52840_connect_kit)	20s
build (nice_nano)	29s
build (nrf52840_bboard)	21s
build (nrf52840_m2)	20s
build (ohs2020_badge)	23s
build (particle_argon)	30s
build (particle_boron)	22s
build (particle_xenon)	22s
build (pca10056)	23s
build (pca10059)	22s
build (pca10100)	23s
build (pillbug)	24s
build (pitaya_go)	20s
build (raytac_mdbt50q_db_40)	20s
build (raytac_mdbt50q_rx)	28s
build (sparkfun_nrf52840_micromod)	30s
build (waveshare_nrf52840_eval)	19s
build (xiao_nrf52840_ble)	20s
build (xiao_nrf52840_ble_sense)	19s
	18m 48s

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