Update getting-started-with-swift.md
Update getting-started-with-swift.md

Beta version of Xcode 6.3 introduces a new language version (1.2) and requires migrating code from Swift 1.1
Once Xcode 6.3.x is release we can migrate exercises to swift 1.2
exercism/DEPRECATED.help.exercism.io,lfex/exercism-docs,yurrriq/docs,canweriotnow/docs,lfex/exercism-docs,arashbi/docs,exercism/DEPRECATED.help.exercism.io,alexclarkofficial/docs,ekse/exercism-docs,ekse/exercism-docs,ZacharyRSmith/docs,canweriotnow/docs,arashbi/docs,spazm/docs,ZacharyRSmith/docs,k4rtik/docs,NobbZ/docs,alexclarkofficial/docs,k4rtik/docs,yurrriq/docs,spazm/docs,rchavarria/docs,NobbZ/docs,rchavarria/docs