Improve AP changelog entry about layout method with nil return
Improve AP changelog entry about layout method with nil return

Add a note about getting the "no layout" behavior by returning "false"
to make it easier for people that might need to change their code.

Related to #8458. [ci skip]

fabianoleittes/rails,Stellenticket/rails,Erol/rails,bradleypriest/rails,gavingmiller/rails,sealocal/rails,riseshia/railsguides.kr,illacceptanything/illacceptanything,ngpestelos/rails,arjes/rails,travisofthenorth/rails,kddeisz/rails,assain/rails,sealocal/rails,richseviora/rails,yahonda/rails,rails/rails,mtsmfm/railstest,aditya-kapoor/rails,gfvcastro/rails,kddeisz/rails,rossta/rails,MichaelSp/rails,iainbeeston/rails,betesh/rails,joonyou/rails,rossta/rails,kddeisz/rails,gauravtiwari/rails,illacceptanything/illacceptanything,travisofthenorth/rails,bradleypriest/rails,hanystudy/rails,kmcphillips/rails,riseshia/railsguides.kr,tjschuck/rails,sergey-alekseev/rails,schuetzm/rails,rails/rails,kmcphillips/rails,mijoharas/rails,untidy-hair/rails,EmmaB/rails-1,richseviora/rails,illacceptanything/illacceptanything,yhirano55/rails,illacceptanything/illacceptanything,kddeisz/rails,illacceptanything/illacceptanything,Vasfed/rails,Spin42/rails,yawboakye/rails,arunagw/rails,kaspth/rails,flanger001/rails,coreyward/rails,schuetzm/rails,betesh/rails,eileencodes/rails,Sen-Zhang/rails,illacceptanything/illacceptanything,Stellenticket/rails,flanger001/rails,stefanmb/rails,joonyou/rails,gcourtemanche/rails,tgxworld/rails,gfvcastro/rails,illacceptanything/illacceptanything,koic/rails,Erol/rails,prathamesh-sonpatki/rails,yasslab/railsguides.jp,mathieujobin/reduced-rails-for-travis,baerjam/rails,yasslab/railsguides.jp,BlakeWilliams/rails,palkan/rails,illacceptanything/illacceptanything,repinel/rails,sealocal/rails,palkan/rails,lucasmazza/rails,MSP-Greg/rails,mathieujobin/reduced-rails-for-travis,georgeclaghorn/rails,bogdanvlviv/rails,yalab/rails,BlakeWilliams/rails,repinel/rails,samphilipd/rails,marklocklear/rails,kachick/rails,odedniv/rails,Vasfed/rails,MSP-Greg/rails,Envek/rails,Spin42/rails,xlymian/rails,rails/rails,yahonda/rails,schuetzm/rails,ttanimichi/rails,lcreid/rails,mtsmfm/railstest,rafaelfranca/omg-rails,pvalena/rails,lcreid/rails,voray/rails,mtsmfm/rails,kaspth/rails,travisofthenorth/rails,arjes/rails,tjschuck/rails,illacceptanything/illacceptanything,matrinox/rails,sergey-alekseev/rails,yalab/rails,flanger001/rails,kamipo/rails,aditya-kapoor/rails,mohitnatoo/rails,utilum/rails,gauravtiwari/rails,bogdanvlviv/rails,notapatch/rails,jeremy/rails,kmayer/rails,amoody2108/TechForJustice,mijoharas/rails,kenta-s/rails,esparta/rails,gavingmiller/rails,joonyou/rails,illacceptanything/illacceptanything,lucasmazza/rails,yawboakye/rails,gfvcastro/rails,gcourtemanche/rails,fabianoleittes/rails,jeremy/rails,arunagw/rails,kaspth/rails,ledestin/rails,gcourtemanche/rails,yasslab/railsguides.jp,alecspopa/rails,brchristian/rails,palkan/rails,baerjam/rails,georgeclaghorn/rails,alecspopa/rails,georgeclaghorn/rails,maicher/rails,printercu/rails,eileencodes/rails,riseshia/railsguides.kr,esparta/rails,utilum/rails,yalab/rails,illacceptanything/illacceptanything,tijwelch/rails,printercu/rails,mechanicles/rails,Edouard-chin/rails,deraru/rails,hanystudy/rails,Envek/rails,mtsmfm/rails,repinel/rails,elfassy/rails,vassilevsky/rails,Stellenticket/rails,matrinox/rails,iainbeeston/rails,untidy-hair/rails,felipecvo/rails,untidy-hair/rails,yhirano55/rails,vassilevsky/rails,maicher/rails,bolek/rails,voray/rails,ngpestelos/rails,mechanicles/rails,pvalena/rails,odedniv/rails,ttanimichi/rails,printercu/rails,sergey-alekseev/rails,starknx/rails,betesh/rails,kamipo/rails,repinel/rails,pvalena/rails,gfvcastro/rails,arunagw/rails,gauravtiwari/rails,MSP-Greg/rails,eileencodes/rails,palkan/rails,esparta/rails,vipulnsward/rails,kenta-s/rails,vipulnsward/rails,ttanimichi/rails,yhirano55/rails,mijoharas/rails,eileencodes/rails,pschambacher/rails,stefanmb/rails,maicher/rails,Edouard-chin/rails,ledestin/rails,illacceptanything/illacceptanything,lcreid/rails,richseviora/rails,brchristian/rails,kenta-s/rails,prathamesh-sonpatki/rails,marklocklear/rails,xlymian/rails,coreyward/rails,koic/rails,assain/rails,prathamesh-sonpatki/rails,pvalena/rails,MichaelSp/rails,deraru/rails,tijwelch/rails,yahonda/rails,tgxworld/rails,BlakeWilliams/rails,Erol/rails,tgxworld/rails,starknx/rails,EmmaB/rails-1,rbhitchcock/rails,bradleypriest/rails,shioyama/rails,iainbeeston/rails,mechanicles/rails,mathieujobin/reduced-rails-for-travis,iainbeeston/rails,georgeclaghorn/rails,ledestin/rails,stefanmb/rails,untidy-hair/rails,bogdanvlviv/rails,MSP-Greg/rails,tijwelch/rails,travisofthenorth/rails,odedniv/rails,mechanicles/rails,brchristian/rails,starknx/rails,Edouard-chin/rails,marklocklear/rails,88rabbit/newRails,ngpestelos/rails,jeremy/rails,coreyward/rails,betesh/rails,prathamesh-sonpatki/rails,flanger001/rails,fabianoleittes/rails,kachick/rails,jeremy/rails,rails/rails,riseshia/railsguides.kr,baerjam/rails,EmmaB/rails-1,esparta/rails,pschambacher/rails,notapatch/rails,illacceptanything/illacceptanything,gavingmiller/rails,tjschuck/rails,Edouard-chin/rails,Erol/rails,samphilipd/rails,deraru/rails,koic/rails,kirs/rails-1,samphilipd/rails,lucasmazza/rails,deraru/rails,schuetzm/rails,Sen-Zhang/rails,lcr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