Fix typo in upgrading guide
Fix typo in upgrading guide

- [ci skip]
- behvaior -> behavior

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