Add an upgrade note related to ActionController::Live becoming a Concern
Add an upgrade note related to ActionController::Live becoming a Concern

See issue #25581:

https://github.com/rails/rails/issues/25581
illacceptanything/illacceptanything,mtsmfm/railstest,printercu/rails,kirs/rails-1,Stellenticket/rails,maicher/rails,yahonda/rails,tijwelch/rails,kirs/rails-1,riseshia/railsguides.kr,tjschuck/rails,printercu/rails,flanger001/rails,shioyama/rails,mtsmfm/rails,kachick/rails,kaspth/rails,sealocal/rails,gcourtemanche/rails,joonyou/rails,eileencodes/rails,mohitnatoo/rails,tjschuck/rails,gauravtiwari/rails,coreyward/rails,sergey-alekseev/rails,assain/rails,kmayer/rails,esparta/rails,bolek/rails,Envek/rails,Stellenticket/rails,bolek/rails,jeremy/rails,MichaelSp/rails,deraru/rails,yasslab/railsguides.jp,kddeisz/rails,ngpestelos/rails,pvalena/rails,Edouard-chin/rails,betesh/rails,yalab/rails,flanger001/rails,illacceptanything/illacceptanything,Sen-Zhang/rails,georgeclaghorn/rails,schuetzm/rails,kenta-s/rails,EmmaB/rails-1,gauravtiwari/rails,lucasmazza/rails,baerjam/rails,eileencodes/rails,kirs/rails-1,kmayer/rails,stefanmb/rails,kamipo/rails,sealocal/rails,betesh/rails,Spin42/rails,aditya-kapoor/rails,lcreid/rails,Erol/rails,voray/rails,untidy-hair/rails,odedniv/rails,BlakeWilliams/rails,iainbeeston/rails,yasslab/railsguides.jp,utilum/rails,bradleypriest/rails,marklocklear/rails,gavingmiller/rails,arunagw/rails,kachick/rails,iainbeeston/rails,tijwelch/rails,joonyou/rails,betesh/rails,tjschuck/rails,gfvcastro/rails,illacceptanything/illacceptanything,kenta-s/rails,travisofthenorth/rails,untidy-hair/rails,illacceptanything/illacceptanything,schuetzm/rails,vipulnsward/rails,assain/rails,kmcphillips/rails,maicher/rails,sergey-alekseev/rails,Envek/rails,repinel/rails,kmcphillips/rails,alecspopa/rails,bradleypriest/rails,arunagw/rails,arjes/rails,Vasfed/rails,mijoharas/rails,notapatch/rails,rafaelfranca/omg-rails,kachick/rails,illacceptanything/illacceptanything,yhirano55/rails,illacceptanything/illacceptanything,maicher/rails,mijoharas/rails,aditya-kapoor/rails,MSP-Greg/rails,jeremy/rails,kmcphillips/rails,voray/rails,MSP-Greg/rails,eileencodes/rails,ttanimichi/rails,riseshia/railsguides.kr,riseshia/railsguides.kr,utilum/rails,yahonda/rails,xlymian/rails,marklocklear/rails,gavingmiller/rails,repinel/rails,yhirano55/rails,richseviora/rails,MichaelSp/rails,yawboakye/rails,fabianoleittes/rails,repinel/rails,alecspopa/rails,Spin42/rails,mijoharas/rails,arjes/rails,starknx/rails,Erol/rails,koic/rails,brchristian/rails,bradleypriest/rails,sealocal/rails,illacceptanything/illacceptanything,rails/rails,mechanicles/rails,kddeisz/rails,pschambacher/rails,richseviora/rails,Sen-Zhang/rails,tgxworld/rails,palkan/rails,samphilipd/rails,mohitnatoo/rails,fabianoleittes/rails,pvalena/rails,prathamesh-sonpatki/rails,matrinox/rails,yhirano55/rails,travisofthenorth/rails,kddeisz/rails,arunagw/rails,felipecvo/rails,lucasmazza/rails,yawboakye/rails,illacceptanything/illacceptanything,illacceptanything/illacceptanything,ledestin/rails,Sen-Zhang/rails,rbhitchcock/rails,schuetzm/rails,bolek/rails,richseviora/rails,baerjam/rails,mohitnatoo/rails,kamipo/rails,illacceptanything/illacceptanything,riseshia/railsguides.kr,marklocklear/rails,yasslab/railsguides.jp,mohitnatoo/rails,bogdanvlviv/rails,xlymian/rails,printercu/rails,lcreid/rails,palkan/rails,lcreid/rails,bogdanvlviv/rails,Edouard-chin/rails,matrinox/rails,Erol/rails,ngpestelos/rails,xlymian/rails,mtsmfm/railstest,gfvcastro/rails,hanystudy/rails,Erol/rails,mtsmfm/rails,koic/rails,BlakeWilliams/rails,koic/rails,kmayer/rails,untidy-hair/rails,mtsmfm/rails,utilum/rails,Envek/rails,illacceptanything/illacceptanything,lcreid/rails,ledestin/rails,travisofthenorth/rails,illacceptanything/illacceptanything,pvalena/rails,rails/rails,rafaelfranca/omg-rails,gcourtemanche/rails,notapatch/rails,vipulnsward/rails,printercu/rails,Vasfed/rails,illacceptanything/illacceptanything,elfassy/rails,rafaelfranca/omg-rails,yasslab/railsguides.jp,palkan/rails,brchristian/rails,stefanmb/rails,eileencodes/rails,iainbeeston/rails,sergey-alekseev/rails,gfvcastro/rails,bogdanvlviv/rails,kaspth/rails,shioyama/rails,elfassy/rails,EmmaB/rails-1,georgeclaghorn/rails,Stellenticket/rails,hanystudy/rails,EmmaB/rails-1,tijwelch/rails,samphilipd/rails,bogdanvlviv/rails,felipecvo/rails,baerjam/rails,esparta/rails,yhirano55/rails,BlakeWilliams/rails,rails/rails,yalab/rails,starknx/rails,palkan/rails,betesh/rails,notapatch/rails,arjes/rails,odedniv/rails,yawboakye/rails,mechanicles/rails,mtsmfm/railstest,aditya-kapoor/rails,stefanmb/rails,kaspth/rails,prathamesh-sonpatki/rails,esparta/rails,illacceptanything/illacceptanything,kenta-s/rails,schuetzm/rails,yahonda/rails,shioyama/rails,jeremy/rails,joonyou/rails,deraru/rails,lucasmazza/rails,vipulnsward/rails,assain/rails,gauravtiwari/rails,deraru/rails,shioyama/rails,ledestin/rails,MSP-Greg/rails,felipecvo/rails,mathieujobin/reduced-rails-for-travis,odedniv/rails,brchristian/rails,ngpestelos/rails,rbhitchcock/rails,yalab/rails,mechanicles/rails,Stellenticket/rails,rbhitchcock/rails,ttanimichi/rails,arunagw/rails,Envek/rails,matrinox/rails,BlakeWilliams/rails,Edouard-chin/rails,baerjam/rails,Edouard-chin/rails,tgxworld/rails,gcourtemanche/rails,illacceptanything/illacceptanything,iainbeeston/rails,gfvcastro/rails,gavingmiller/rails,Spin42/rails,rossta/rails,fabianoleittes/rails,ttanimichi/rails,tgxworld/rails,alecspopa/rails,aditya-kapoor/rails,rossta/rails,untidy-hair/rails,rossta/rails,notapatch/rails,utilum/rails,coreyward/rails,voray/rails,kddeisz/rails,mechanicles/rails,esparta/rails,Vasfed/rails,jeremy/rails,Vasfed/rails,fabianoleittes/rails,pschambacher/rails,repinel/rails,kmcphillips/rails,tgxworld/rails,joonyou/rails,samphilipd/rails,MichaelSp/rails,starknx/rails,deraru/rails,georgeclaghorn/rails,yahonda/rails,georgeclaghorn/rails,coreyward/rails,mathieujobin/reduced-rails-for-travis,yalab/rails,assain/rails,vipulnsward/rails,MSP-Greg/rails,flanger001/rails,kamipo/rails,hanystudy/rails,mathieujobin/reduced-rails-for-travis,flanger001/rails,travisofthenorth/rails,pvalena/rails,prathamesh-sonpatki/rails,yawboakye/rails,elfassy/rails,rails/rails,tjschuck/rails,pschambacher/rails,prathamesh-sonpatki/rails