Small fixes in README
Small fixes in README

mackoj/SwiftGen,Nick11/SwiftGen,esttorhe/SwiftGen,Nick11/SwiftGen,leopardpan/SwiftGen,alessandrostone/SwiftGen,hoanganh6491/SwiftGen,esttorhe/SwiftGen,ldiqual/SwiftGen,alessandrostone/SwiftGen,ldiqual/SwiftGen,leopardpan/SwiftGen,hoanganh6491/SwiftGen,mackoj/SwiftGen