doctor: don't warn about recent MacGPG2 versions
doctor: don't warn about recent MacGPG2 versions

Fixes Homebrew/homebrew#12238.

mistydemeo/homebrew,rwhogg/brew,claui/brew,ilovezfs/brew,AnastasiaSulyagina/brew,maxim-belkin/brew,JCount/brew,Homebrew/brew,sjackman/homebrew,hanxue/linuxbrew,Linuxbrew/brew,sjackman/homebrew,pseudocody/brew,amar-laksh/brew_sudo,tonyg/homebrew,pseudocody/brew,nandub/brew,muellermartin/dist,palxex/brew,toonetown/homebrew,MikeMcQuaid/brew,konqui/brew,zmwangx/brew,reelsense/brew,reelsense/brew,sjackman/homebrew,vitorgalvao/brew,staticfloat/brew,konqui/brew,reitermarkus/brew,Linuxbrew/brew,nandub/brew,toonetown/homebrew,MikeMcQuaid/brew,claui/brew,EricFromCanada/brew,MikeMcQuaid/brew,zmwangx/brew,palxex/brew,ilovezfs/brew,gordonmcshane/homebrew,nandub/brew,konqui/brew,DomT4/brew,mistydemeo/homebrew,JCount/brew,Homebrew/brew,mahori/brew,muellermartin/dist,nandub/brew,aw1621107/brew,Linuxbrew/brew,mahori/brew,staticfloat/brew,aw1621107/brew,vitorgalvao/brew,JCount/brew,vitorgalvao/brew,bfontaine/brew,gordonmcshane/homebrew,tonyg/homebrew,reelsense/brew,DomT4/brew,Linuxbrew/brew,jmsundar/brew,AnastasiaSulyagina/brew,reitermarkus/brew,mistydemeo/homebrew,hanxue/linuxbrew,claui/brew,konqui/brew,hanxue/linuxbrew,amar-laksh/brew_sudo,jmsundar/brew,Homebrew/brew,DomT4/brew,mahori/brew,pseudocody/brew,EricFromCanada/brew,palxex/brew,rwhogg/brew,bfontaine/brew,EricFromCanada/brew,gregory-nisbet/brew,mgrimes/brew,jmsundar/brew,maxim-belkin/brew,staticfloat/brew,bfontaine/brew,alyssais/brew,reitermarkus/brew,JCount/brew,ilovezfs/brew,DomT4/brew,zmwangx/brew,claui/brew,toonetown/homebrew,gregory-nisbet/brew,mgrimes/brew,muellermartin/dist,alyssais/brew,maxim-belkin/brew,rwhogg/brew,mgrimes/brew,gordonmcshane/homebrew,aw1621107/brew,amar-laksh/brew_sudo,AnastasiaSulyagina/brew,tonyg/homebrew,alyssais/brew,EricFromCanada/brew,Homebrew/brew,reitermarkus/brew,MikeMcQuaid/brew,gregory-nisbet/brew,sjackman/homebrew,mahori/brew,vitorgalvao/brew