Update Setup_and_Flashing_Guide.md (#228)

small spelling error

Author: GitHubEmploy

V0_Display/Documentation/Setup_and_Flashing_Guide.md

@@ -36,7 +36,7 @@
 
 9) Run `make flash FLASH_DEVICE=xxxx:yyyy` (using xxxx:yyyy from above)
 	- You may see what appears to be an "error" after flashing your board. (Blue box)
-	- As long as you see the `File downloded successfully` text (Green box) you are good to proceed.
+	- As long as you see the `File downloaded successfully` text (Green box) you are good to proceed.
  	- The error (Red box) seems to be caused by the controller immediately running the uploaded code and no longer appearing as a DFU device. This is not an issue, as long as the board reports a Klipper serial name.
 		<img src="../Images/dfu-util_Flashing_Error.png" width="500">