chore(engine): Fix node engine to major version 20 to avoid node 24 dependency issues (#2002)

Author: Mephistic

package.json

@@ -50,7 +50,7 @@
     "setRole": "ts-node -P tsconfig.script.json scripts/firebase-admin/setRole.ts"
   },
   "engines": {
-    "node": ">=20",
+    "node": "^20",
     "yarn": "^1.22.19"
   },
   "browserslist": {