Tags incorrectly uses username

[GeorgeRNG]

It uses the legacy system, of name#discriminator

It should be name or @name with the new discord system.

HelpBot/src/main/java/com/diamondfire/helpbot/sys/tag/Tag.java

Line 74 in 87c42c5

.setFooter("Executed by " + requester.getAsTag(), requester.getAvatarUrl());