Update mcu_setup.md

Author: malcolm-sparkfun

docs/mcu_setup.md

@@ -23,6 +23,8 @@ Download the .zip archive for your board from the release link above and extract
 
 ```python -m esptool --chip esp32 -b 460800 --before default_reset --after hard_reset write_flash --flash_mode dio --flash_size 4MB --flash_freq 40m 0x1000 bootloader.bin 0x8000 partition-table.bin 0x10000 micropython.bin```
 
+Connect to it with one of the [suggested development environments](#suggested-development-environments) below.  
+
 ## Suggested Development Environments
 
 ### Thonny