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

Author: renovate[bot]

.github/actions/setup/action.yml

@@ -14,7 +14,7 @@ runs:
       shell: bash
 
     - name: Setup Node.js
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
         node-version: 22
         # No 'cache' here, since now project lockfile for npm

.github/workflows/copilot-setup-steps.yml

@@ -45,7 +45,7 @@ jobs:
         shell: bash
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 22
           # No 'cache' here, since now project lockfile for npm