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

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -24,7 +24,7 @@ jobs:
         id: pnpm-install
 
       - name: Set up Node.js
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version-file: ".nvmrc"