Merge pull request #6511 from blues/swan_r5_uf2_support

feat(swan_r5): Enable UF2 support for Swan R5 board

Author: tannewt

tools/build_board_info.py

@@ -70,6 +70,7 @@
     # stm32
     "meowbit_v121": UF2,
     "sparkfun_stm32_thing_plus": BIN_UF2,
+    "swan_r5": BIN_UF2,
     # esp32c3
     "adafruit_qtpy_esp32c3": BIN,
     "ai_thinker_esp32-c3s": BIN,