add swear word - TRIGGER / CONTENT WARNING: assault, slurs, swearwords, etc

This adds "pewdiepie" to the list of banned words because
"subscribe to pewdiepie" is semi-common spam in the Tavern,
and because there is sometimes hate speech in the YouTube
channel and in some material posted by pewdiepie's fans.

website/server/libs/bannedWords.js

@@ -165,6 +165,8 @@ let bannedWords = [
 
   'heroin',
   'cocaine',
+
+  'pewdiepie',
 ];
 
 module.exports = bannedWords;