add heltec v4.3 board #78

Job	Run time
build (RAK_4631_repeater)	2m 18s
build (RAK_4631_room_server)	2m 13s
build (Heltec_v3_repeater)	2m 49s
build (Heltec_v3_room_server)	2m 52s
build (Heltec_v3_companion_radio_ble)	2m 51s
build (RAK_4631_companion_radio_ble)	2m 13s
build (wio-e5-mini_repeater)	1m 55s
build (PicoW_repeater)	3m 0s
build (LilyGo_Tlora_C6_repeater_)	2m 9s
	22m 20s

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