Update v1.2_build_guide.md

v1.2/v1.2_build_guide.md

@@ -74,6 +74,6 @@ First, hold down the bootloader button on your pico while pluging it into USB. I
 
 Now download the KMK firmware repository from [here](https://github.com/KMKfw/kmk_firmware), and drag and drop the "kmk" folder to the CIRCUITPY drive. Now drag and drop the "main.py" and "boot.py" firmware files for glyph v1.2 to CIRCUITPY. Disconnect the keyboard and plug it in again. Your glyph should now be working.
 
-**IMPORTANT! By default, the boot.py file sets the controller to not show up as a flash drive anymore, in order to avoid annoying file manager pop ups when plugging in. If you want access to the drive later, like for modifying the firmware, simply hold down the ESC when plugging the board in. This will override boot.py, causing it to show up as a drive again.**
+**IMPORTANT! By default, the boot.py file sets the controller to not show up as a flash drive anymore, in order to avoid annoying file manager pop ups when plugging in. If you want access to the drive later, like for modifying the firmware, simply hold down ESC while plugging the board in. This will override boot.py, causing it to show up as a drive until rebooted.**
 
 ![finished](https://github.com/galile0-designs/glyphkbd/assets/134774462/c2fdae0a-7f41-4ba7-8d53-bc7ebc3ecb17)