Clarify change to process helpers [ci skip]
Clarify change to process helpers [ci skip]

Add additional information to the release notes to explain the requirement
for paths in integration tests to start with a leading slash.

Fixes #17870.

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