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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
         uses: go-task/setup-task@v1
 
       - name: Setup Node.js
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version-file: '.nvmrc'
           cache: 'npm'