added Nucleo F334R8 to README
added Nucleo F334R8 to README

fedorcomander/stlink,simonjwright/stlink,trigrass2/stlink,swegener/stlink,gtalusan/stlink,gtalusan/stlink,trigrass2/stlink,simonjwright/stlink,swegener/stlink,chaosAD/stlink,braincorp/stlink,fedorcomander/stlink,braincorp/stlink,chaosAD/stlink