[ci skip] Fix `transaction` code example
[ci skip] Fix `transaction` code example

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