Updating release notes for 2.3.
Updating release notes for 2.3.

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