Fix typo in Windows docker build scripts
Fix typo in Windows docker build scripts

dipinhora/ponyc,jemc/ponyc,dipinhora/ponyc,ponylang/ponyc,jemc/ponyc,sgebbie/ponyc,ponylang/ponyc,sgebbie/ponyc,sgebbie/ponyc,dipinhora/ponyc,jemc/ponyc,ponylang/ponyc,sgebbie/ponyc,sgebbie/ponyc