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

Author: renovate[bot]

.github/workflows/publish.yml

@@ -25,7 +25,7 @@ jobs:
       - uses: oven-sh/setup-bun@v2
         with:
           bun-version: latest
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: "24"
           registry-url: "https://registry.npmjs.org"