chore(deps): update actions/setup-node action to v6 (#345)

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

Author: renovate[bot]

.github/workflows/main.yaml

@@ -12,7 +12,7 @@ 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
@@ -40,7 +40,7 @@ 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