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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v4
     - name: Setup Nodejs
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
         node-version-file: '.nvmrc'