fix build for Windows based on tip from @moinars

platformio.ini

@@ -34,13 +34,15 @@ build_flags = -Wall -Wextra -Wno-missing-field-initializers -Isrc -Os -Wl,-Map,.
 
 ; -DLOG_LOCAL_LEVEL=ESP_LOG_DEBUG -DCORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_DEBUG
 
+; leave this commented out to avoid breaking Windows
+;upload_port = /dev/ttyUSB0
+;monitor_port = /dev/ttyUSB0
+
 upload_speed = 921600
-upload_port = /dev/ttyUSB0
 
 ; the default is esptool
 ; upload_protocol = esp-prog
 
-monitor_port = /dev/ttyUSB0
 monitor_speed = 115200
 
 # debug_tool = esp-prog