chore(ci)(deps): bump actions/setup-node from 4 to 6 (#2151)

Author: dependabot[bot]

.github/workflows/showcase-smoke.yml

@@ -20,7 +20,7 @@ jobs:
     steps:
       - uses: actions/checkout@v7
       - uses: pnpm/action-setup@v6
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 22
           cache: pnpm