Remove hyphens in the adblock list directories

This change to match the Chromium style does not affect anything
else than the contents of the Brave Adblock component in the
brave://rewards page.

This is a follow-up to 7025c8f
(brave/brave-browser#7176).

build/lib/licensing.js

@@ -11,7 +11,7 @@ const knownMissing = new Set([
   // Emailed author ([email protected]) on 2019-11-05.
   path.join('components', 'third_party', 'adblock', 'lists', 'adblock_dk'),
   // https://github.com/gfmaster/adblock-korea-contrib/issues/47
-  path.join('components', 'third_party', 'adblock', 'lists', 'adblock-korea-contrib'),
+  path.join('components', 'third_party', 'adblock', 'lists', 'adblock_korea_contrib'),
 ])
 
 const extractLicenseInfo = (directory) => {