ISSUE_TEMPLATE: tweak instructions.
ISSUE_TEMPLATE: tweak instructions.

Be clearer about what's expected and where to file things.
reitermarkus/brew,nandub/brew,alyssais/brew,DomT4/brew,hanxue/linuxbrew,Linuxbrew/brew,hanxue/linuxbrew,Homebrew/brew,mahori/brew,JCount/brew,pseudocody/brew,muellermartin/dist,tonyg/homebrew,claui/brew,mahori/brew,aw1621107/brew,konqui/brew,zmwangx/brew,palxex/brew,reitermarkus/brew,JCount/brew,tonyg/homebrew,mahori/brew,aw1621107/brew,mgrimes/brew,vitorgalvao/brew,claui/brew,bfontaine/brew,zmwangx/brew,palxex/brew,EricFromCanada/brew,reelsense/brew,alyssais/brew,mahori/brew,bfontaine/brew,vitorgalvao/brew,muellermartin/dist,alyssais/brew,amar-laksh/brew_sudo,rwhogg/brew,reelsense/brew,maxim-belkin/brew,EricFromCanada/brew,JCount/brew,nandub/brew,konqui/brew,MikeMcQuaid/brew,maxim-belkin/brew,Homebrew/brew,reelsense/brew,JCount/brew,muellermartin/dist,konqui/brew,MikeMcQuaid/brew,Homebrew/brew,DomT4/brew,gregory-nisbet/brew,claui/brew,pseudocody/brew,Linuxbrew/brew,DomT4/brew,jmsundar/brew,nandub/brew,jmsundar/brew,sjackman/homebrew,sjackman/homebrew,jmsundar/brew,rwhogg/brew,aw1621107/brew,vitorgalvao/brew,Linuxbrew/brew,MikeMcQuaid/brew,reitermarkus/brew,gregory-nisbet/brew,mgrimes/brew,Linuxbrew/brew,palxex/brew,hanxue/linuxbrew,pseudocody/brew,amar-laksh/brew_sudo,maxim-belkin/brew,tonyg/homebrew,sjackman/homebrew,amar-laksh/brew_sudo,rwhogg/brew,vitorgalvao/brew,zmwangx/brew,gregory-nisbet/brew,EricFromCanada/brew,mgrimes/brew,konqui/brew,ilovezfs/brew,ilovezfs/brew,ilovezfs/brew,DomT4/brew,bfontaine/brew,reitermarkus/brew,MikeMcQuaid/brew,nandub/brew,EricFromCanada/brew,sjackman/homebrew,Homebrew/brew,claui/brew