Fix JSON syntax error in package.json

- Remove trailing comma after setup script
- This was causing npm install to fail in GitHub Actions

Author: loujaybee

backend/catalog/package.json

@@ -8,7 +8,7 @@
     "dev": "nodemon --exec ts-node src/index.ts",
     "build": "tsc",
     "test": "jest",
-    "setup": "./scripts/setup.sh",
+    "setup": "./scripts/setup.sh"
   },
   "dependencies": {
     "express": "^4.18.2",