update: remove stray comma (legacy tap renaming)
update: remove stray comma (legacy tap renaming)

Fix regression introduced in b2c31074e786835b45d0d07ca156cd3fb1ce2a9f.
Backported from Homebrew/brew@93e0f4f9465978460d411f27214e19ae3fc4d294.

3van/homebrew,frodeaa/homebrew,booi/homebrew,ablyler/homebrew,marcwebbie/homebrew,josa42/homebrew,marcwebbie/homebrew,filcab/homebrew,3van/homebrew,influxdata/homebrew,influxdb/homebrew,josa42/homebrew,influxdata/homebrew,brunchboy/homebrew,booi/homebrew,chadcatlett/homebrew,yumitsu/homebrew,lrascao/homebrew,3van/homebrew,theeternalsw0rd/homebrew,Homebrew/homebrew,michaKFromParis/homebrew-sparks,marcwebbie/homebrew,josa42/homebrew,influxdb/homebrew,cscetbon/homebrew,Homebrew/homebrew,brunchboy/homebrew,influxdb/homebrew,frodeaa/homebrew,ablyler/homebrew,cscetbon/homebrew,ablyler/homebrew,gawbul/homebrew,filcab/homebrew,mkrapp/homebrew,joshfriend/homebrew,influxdata/homebrew,mkrapp/homebrew,marcwebbie/homebrew,lrascao/homebrew,frodeaa/homebrew,mkrapp/homebrew,theeternalsw0rd/homebrew,influxdb/homebrew,theeternalsw0rd/homebrew,yumitsu/homebrew,cscetbon/homebrew,booi/homebrew,theeternalsw0rd/homebrew,Homebrew/homebrew,gawbul/homebrew,filcab/homebrew,3van/homebrew,brunchboy/homebrew,deorth/homebrew,lrascao/homebrew,michaKFromParis/homebrew-sparks,chadcatlett/homebrew,deorth/homebrew,chadcatlett/homebrew,frodeaa/homebrew,deorth/homebrew,michaKFromParis/homebrew-sparks,filcab/homebrew,influxdata/homebrew,yumitsu/homebrew,joshfriend/homebrew,brunchboy/homebrew,Homebrew/homebrew,ablyler/homebrew,joshfriend/homebrew,gawbul/homebrew