fix: json is officially the worst format ever

Author: atlj

packages/create-react-native-library/templates/common/$package.json

@@ -164,10 +164,12 @@
         {
           "project": "tsconfig.build.json"
         }
+<% if (project.arch !== 'legacy') { -%>
       ],
-  <% if (project.arch !== 'legacy') { -%>
       "codegen"
-  <% } -%>
+<% } else { -%>
+      ]
+<% } -%>
     ]
 <% if (project.arch !== 'legacy') { -%>
   },