Small edits to activerecord/CHANGELOG.md
Small edits to activerecord/CHANGELOG.md

[ci skip]

- add period where necessary
- add backticks where necessary

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