Fix creating valid workspace file (#52)

Author: maicki

templates/ios.js

@@ -59,8 +59,7 @@ RCT_EXPORT_MODULE()
   `,
 }, {
   name: ({ name }) => `${platform}/${name}.xcworkspace/contents.xcworkspacedata`,
-  content: ({ name }) => `// !$*UTF8*$!
-<?xml version="1.0" encoding="UTF-8"?>
+  content: ({ name }) => `<?xml version="1.0" encoding="UTF-8"?>
 <Workspace
    version = "1.0">
    <FileRef