correcting word smpt -> smtp in ActionMailer guide [ci skip]
correcting word smpt -> smtp in ActionMailer guide [ci skip]

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