Update CHANGELOG.md
Update CHANGELOG.md

Add link for proposal SE-0227
jckarter/swift,CodaFi/swift,harlanhaskins/swift,austinzheng/swift,CodaFi/swift,rudkx/swift,devincoughlin/swift,hooman/swift,hooman/swift,glessard/swift,allevato/swift,gribozavr/swift,devincoughlin/swift,stephentyrone/swift,aschwaighofer/swift,gregomni/swift,karwa/swift,stephentyrone/swift,ahoppen/swift,airspeedswift/swift,harlanhaskins/swift,shajrawi/swift,apple/swift,harlanhaskins/swift,airspeedswift/swift,sschiau/swift,tkremenek/swift,xedin/swift,roambotics/swift,gribozavr/swift,stephentyrone/swift,benlangmuir/swift,rudkx/swift,jckarter/swift,roambotics/swift,shajrawi/swift,practicalswift/swift,nathawes/swift,karwa/swift,stephentyrone/swift,aschwaighofer/swift,tkremenek/swift,devincoughlin/swift,gribozavr/swift,atrick/swift,shahmishal/swift,atrick/swift,rudkx/swift,parkera/swift,tkremenek/swift,shajrawi/swift,danielmartin/swift,jmgc/swift,lorentey/swift,roambotics/swift,gribozavr/swift,stephentyrone/swift,practicalswift/swift,gribozavr/swift,glessard/swift,parkera/swift,airspeedswift/swift,nathawes/swift,jmgc/swift,devincoughlin/swift,practicalswift/swift,gregomni/swift,gregomni/swift,amraboelela/swift,sschiau/swift,xedin/swift,sschiau/swift,aschwaighofer/swift,parkera/swift,nathawes/swift,atrick/swift,austinzheng/swift,ahoppen/swift,hooman/swift,nathawes/swift,shahmishal/swift,devincoughlin/swift,benlangmuir/swift,danielmartin/swift,austinzheng/swift,sschiau/swift,benlangmuir/swift,rudkx/swift,xedin/swift,parkera/swift,glessard/swift,apple/swift,airspeedswift/swift,glessard/swift,xwu/swift,airspeedswift/swift,atrick/swift,aschwaighofer/swift,karwa/swift,gregomni/swift,roambotics/swift,hooman/swift,shahmishal/swift,harlanhaskins/swift,jmgc/swift,shahmishal/swift,practicalswift/swift,parkera/swift,parkera/swift,JGiola/swift,shajrawi/swift,danielmartin/swift,roambotics/swift,gregomni/swift,harlanhaskins/swift,tkremenek/swift,ahoppen/swift,jckarter/swift,jmgc/swift,JGiola/swift,amraboelela/swift,rudkx/swift,hooman/swift,JGiola/swift,xedin/swift,glessard/swift,xwu/swift,apple/swift,benlangmuir/swift,xedin/swift,atrick/swift,amraboelela/swift,danielmartin/swift,apple/swift,ahoppen/swift,CodaFi/swift,lorentey/swift,stephentyrone/swift,benlangmuir/swift,parkera/swift,sschiau/swift,devincoughlin/swift,shajrawi/swift,practicalswift/swift,tkremenek/swift,nathawes/swift,JGiola/swift,karwa/swift,amraboelela/swift,amraboelela/swift,lorentey/swift,allevato/swift,practicalswift/swift,karwa/swift,allevato/swift,shahmishal/swift,shahmishal/swift,karwa/swift,tkremenek/swift,sschiau/swift,danielmartin/swift,parkera/swift,JGiola/swift,xedin/swift,aschwaighofer/swift,austinzheng/swift,practicalswift/swift,CodaFi/swift,jmgc/swift,lorentey/swift,xwu/swift,danielmartin/swift,austinzheng/swift,allevato/swift,austinzheng/swift,harlanhaskins/swift,nathawes/swift,jckarter/swift,CodaFi/swift,sschiau/swift,nathawes/swift,shahmishal/swift,devincoughlin/swift,stephentyrone/swift,hooman/swift,apple/swift,JGiola/swift,jckarter/swift,CodaFi/swift,jmgc/swift,gribozavr/swift,amraboelela/swift,ahoppen/swift,karwa/swift,glessard/swift,benlangmuir/swift,gregomni/swift,karwa/swift,jmgc/swift,harlanhaskins/swift,lorentey/swift,shahmishal/swift,CodaFi/swift,devincoughlin/swift,sschiau/swift,danielmartin/swift,austinzheng/swift,airspeedswift/swift,shajrawi/swift,practicalswift/swift,roambotics/swift,xedin/swift,lorentey/swift,ahoppen/swift,xedin/swift,hooman/swift,aschwaighofer/swift,xwu/swift,shajrawi/swift,amraboelela/swift,airspeedswift/swift,gribozavr/swift,atrick/swift,lorentey/swift,allevato/swift,xwu/swift,tkremenek/swift,xwu/swift,xwu/swift,rudkx/swift,apple/swift,allevato/swift,gribozavr/swift,lorentey/swift,jckarter/swift,aschwaighofer/swift,jckarter/swift,allevato/swift,shajrawi/swift