doc: soften warning against using install scripts
doc: soften warning against using install scripts

Keep some of the “don’t use install for compilation” verbiage, but
relegate it to bottom-of-the-page status.

yodeyer/npm,cchamberlain/npm-msys2,yodeyer/npm,misterbyrne/npm,rsp/npm,kemitchell/npm,DIREKTSPEED-LTD/npm,kemitchell/npm,haggholm/npm,rsp/npm,chadnickbok/npm,yibn2008/npm,yibn2008/npm,thomblake/npm,princeofdarkness76/npm,rsp/npm,cchamberlain/npm,cchamberlain/npm-msys2,chadnickbok/npm,thomblake/npm,evanlucas/npm,haggholm/npm,xalopp/npm,evanlucas/npm,misterbyrne/npm,lxe/npm,kimshinelove/naver-npm,lxe/npm,Volune/npm,misterbyrne/npm,DIREKTSPEED-LTD/npm,Volune/npm,segrey/npm,cchamberlain/npm-msys2,midniteio/npm,ekmartin/npm,DIREKTSPEED-LTD/npm,Volune/npm,princeofdarkness76/npm,evocateur/npm,kimshinelove/naver-npm,TimeToogo/npm,cchamberlain/npm,DaveEmmerson/npm,evocateur/npm,TimeToogo/npm,yodeyer/npm,ekmartin/npm,segrey/npm,DaveEmmerson/npm,yibn2008/npm,midniteio/npm,DaveEmmerson/npm,kimshinelove/naver-npm,segrey/npm,thomblake/npm,TimeToogo/npm,kemitchell/npm,cchamberlain/npm,evocateur/npm,princeofdarkness76/npm,haggholm/npm,chadnickbok/npm,evanlucas/npm,midniteio/npm,ekmartin/npm,xalopp/npm,lxe/npm,xalopp/npm