Update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/publish.yaml

@@ -13,7 +13,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Setup Node.js environment
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
         node-version: 18
         registry-url: 'https://registry.npmjs.org'

.github/workflows/test.yaml

@@ -25,7 +25,7 @@ jobs:
           fetch-depth: 0
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 18