fix(rsc-demo): downgrade jsdom to 24.x for Node 18 compatibility

jsdom 27.x requires Node 20+, but CI runs on Node 18.
Downgrade to jsdom 24.1.1 which supports Node 18.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ScriptedAlchemy

apps/rsc-demo/package.json

@@ -40,7 +40,7 @@
     "@module-federation/runtime": "workspace:*",
     "@playwright/test": "^1.48.2",
     "cross-env": "^7.0.3",
-    "jsdom": "^27.2.0",
+    "jsdom": "^24.1.1",
     "prettier": "1.19.1",
     "supertest": "^7.1.4"
   },

apps/rsc-demo/packages/e2e/package.json

@@ -12,7 +12,7 @@
     "kill-port": "^2.0.1",
     "@playwright/test": "^1.48.2",
     "supertest": "^7.1.4",
-    "jsdom": "^27.2.0"
+    "jsdom": "^24.1.1"
   },
   "dependencies": {
     "react": "19.2.0",