libidn2: update 2.1.1a bottle for Linuxbrew.
libidn2: update 2.1.1a bottle for Linuxbrew.

rwhogg/homebrew-core,rwhogg/homebrew-core,LinuxbrewTestBot/homebrew-core,Linuxbrew/homebrew-core,maxim-belkin/homebrew-core,Linuxbrew/homebrew-core,LinuxbrewTestBot/homebrew-core,maxim-belkin/homebrew-core