Make ^NOTE in markdown/html files bold

2015/yang/README.md

@@ -27,7 +27,7 @@ this entry uses to tell the 5 languages/flavors apart. Can you find all four?
 The way the text is encoded in the output doesn't cease to amaze. Can you tell
 why an array of 512 elements is needed?
 
-NOTE: the author calls the program `Fuuko` and so the source file referred to in
+**NOTE**: the author calls the program `Fuuko` and so the source file referred to in
 their remarks uses `fuuko.c`. The [Makefile](%%REPO_URL%%/2015/yang/Makefile) will compile everything
 so you need not worry about this.