fix: Missed markup

Author: andrewferrier

README.md

@@ -53,7 +53,7 @@ It provides various improvements:
 **NOTE: This demo gives an idea of what `debugprint` does, but does not show some of
 the more recent capabilities such as using treesitter to pick up a variable name, deleting
 debug lines with a command, and uses older deprecated keymappings - the new ones are `g?p`, `g?P`,
-`g?v` and `g?V`).
+`g?v` and `g?V`).**
 
 <div align="center">
   <video src="https://user-images.githubusercontent.com/107015/184187236-34f80a31-9626-4a3b-8d03-0f52752781e6.mp4" type="video/mp4"></video>