chore: update Node.js setup action to v6 in automated tests workflow

Author: KristjanESPERANTO

.github/workflows/automated-tests.yaml

@@ -17,7 +17,7 @@ jobs:
       - name: Check out repository code
         uses: actions/checkout@v5
       - name: Use Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: lts/*
           cache: npm