build(deps): update actions/setup-node action to v6 (#1114)

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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
       uses: actions/checkout@v5
 
     - name: Use node ${{ matrix.node_version }}
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
         node-version: ${{ matrix.node_version }}
 
@@ -68,7 +68,7 @@ jobs:
       uses: actions/checkout@v5
 
     - name: Use node ${{ matrix.node_version }}
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
         node-version: ${{ matrix.node_version }}