fix: extra comma breaking

Author: dannyhw

.changeset/fluffy-owls-mate.md

@@ -0,0 +1,6 @@
+---
+'create-expo-stack': patch
+'rn-new': patch
+---
+
+fix for extra comma

cli/src/templates/base/package.json.ejs

@@ -186,8 +186,8 @@
   <% if (props.navigationPackage?.name !== "expo-router") { %>
     "main": "node_modules/expo/AppEntry.js",
   <% } %>
-  "private": true,
   <% if  (props.packageManager === "yarn"){ %>
-    "packageManager": "[email protected]"
+    "packageManager": "[email protected]",
   <% } %>
+  "private": true
 }