chore(deps): update actions/setup-node action to v6 (#547)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/main.yaml

@@ -17,7 +17,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Use Node.js 22.x
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: '22.x'
       - run: npm ci
@@ -47,7 +47,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Use Node.js 24.x
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: '24.x'
       - run: npm ci