Upgrade GitHub Actions to checkout and setup-node v6

Author: karussell

.github/workflows/push_dist_to_npm.yml

@@ -13,10 +13,10 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: v24.12.0