Update actions/setup-node action to v6 (#261)

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

Author: renovate[bot]

.github/workflows/test.yml

@@ -90,7 +90,7 @@ jobs:
       - 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
 
@@ -116,7 +116,7 @@ jobs:
           ref: ${{ github.head_ref }}
 
       - name: Use Node.js 22.x
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: 22.x