Update 03.1.md
Update 03.1.md

Fixed some of the typos
songqii/build-web-application-with-golang,faxriddin/build-web-application-with-golang,admpub/build-web-application-with-golang,WangKaimin/build-web-application-with-golang,astaxie/build-web-application-with-golang,faxriddin/build-web-application-with-golang,astaxie/build-web-application-with-golang,admpub/build-web-application-with-golang,admpub/build-web-application-with-golang,astaxie/build-web-application-with-golang,songqii/build-web-application-with-golang,WangKaimin/build-web-application-with-golang,admpub/build-web-application-with-golang