Replace template’s `j1` with `deparallelize`
Replace template’s `j1` with `deparallelize`

Solely because I think `ENV.deparallelize` is *way* clearer than
`ENV.j1`, at least to the uninitiated.

Also, updating the template will reduce the number of `ENV.j1`s that
persist because the Homebrew maintainers want clean histories of
formulae. Ideally, this change should prevent any more cases from being
introduced!

Closes Homebrew/homebrew#25431.

Signed-off-by: Jack Nagel <43386ce32af96f5c56f2a88e458cb94cebee3751@gmail.com>

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