README: update key expiry
README: update key expiry

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