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

Author: renovate[bot]

.github/workflows/npm-publish.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: '24'
           registry-url: 'https://registry.npmjs.org'

.github/workflows/test-on-pr.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: setup node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 24
       - name: install Rust stable
@@ -69,7 +69,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: setup node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 24
       - name: install dependencies