remove extra space on snippet section (#4298)

Author: jwunderl

docs/live-coding.md

@@ -4,7 +4,7 @@ Live coding of tutorials for MakeCode for micro:bit on https://mixer.com/MakeCod
 
 ## Videos
 
-###  ~ codecard
+### ~ codecard
 * name: Flashing Heart
 * description: In this video, we'll be going through the Flashing Heart Tutorial - https://makecode.microbit.org/#tutorial:/projects/flashing-heart.
 * youTubeId: NvEOKZ8wh9s