fix(Designer): Manually set playwright test env node version to 20 (#6024)

* Removed "assert" usage

* Reverted assert change, changed playwright test node version

Author: rllyy97

.github/workflows/playwright.yml

@@ -12,7 +12,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4
       with:
-        node-version: lts/*
+        node-version: 20.x
     - uses: pnpm/action-setup@v3
       with:
         version: 9.1.3