ci: run tests on node 20.5 until hotfix arrives

nodejs/node#49497

Author: danielroe

.github/workflows/ci.yml

@@ -62,7 +62,7 @@ jobs:
       - run: corepack enable
       - uses: actions/setup-node@v3
         with:
-          node-version: 20
+          node-version: 20.5
           cache: "pnpm"
       - run: pnpm install
       - run: pnpm dev:prepare