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

Author: renovate[bot]

.github/workflows/main.yaml

@@ -18,7 +18,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Use Node.js 24.x
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: '24.x'
       - run: npm ci
@@ -48,7 +48,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Use Node.js 24.x
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: '24.x'
       - run: npm ci