Merge pull request #6459 from NathanY3G/enable-uf2-builds-for-stm32-thing-plus

Enable UF2 builds for STM32 Thing Plus

Author: ladyada

tools/build_board_info.py

@@ -69,6 +69,7 @@
     "microbit_v2": COMBINED_HEX,
     # stm32
     "meowbit_v121": UF2,
+    "sparkfun_stm32_thing_plus": BIN_UF2,
     # esp32c3
     "adafruit_qtpy_esp32c3": BIN,
     "ai_thinker_esp32-c3s": BIN,