ci: disable postinstall scripts and update nx (#2654)

## Summary:

Mitigate
GHSA-cxm3-wv7p-598c

Author: Saadnajmi

.yarnrc.yml

@@ -1,3 +1,5 @@
 nodeLinker: node-modules
 
+enableScripts: false
+
 yarnPath: .yarn/releases/yarn-4.9.3.cjs

package.json

@@ -53,7 +53,7 @@
     "@babel/preset-flow": "^7.24.7",
     "@definitelytyped/dtslint": "^0.0.127",
     "@jest/create-cache-key-function": "^29.7.0",
-    "@nx/js": "^21.2.4",
+    "@nx/js": "^21.4.1",
     "@react-native/metro-babel-transformer": "workspace:*",
     "@react-native/metro-config": "workspace:*",
     "@tsconfig/node18": "1.0.1",
@@ -100,7 +100,7 @@
     "micromatch": "^4.0.4",
     "node-fetch": "^2.2.0",
     "nullthrows": "^1.1.1",
-    "nx": "21.2.4",
+    "nx": "21.4.1",
     "prettier": "2.8.8",
     "prettier-plugin-hermes-parser": "0.25.1",
     "react": "19.0.0",

packages/nx-release-version/package.json

@@ -15,7 +15,7 @@
     "directory": "packages/nx-release-version"
   },
   "dependencies": {
-    "@nx/js": "^21.2.4"
+    "@nx/js": "^21.4.1"
   },
   "devDependencies": {
     "@rnx-kit/tsconfig": "^2.0.0",