chore(deps): update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - run: corepack enable
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: lts/*
           cache: "pnpm"