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

| datasource  | package            | from | to |
| ----------- | ------------------ | ---- | -- |
| github-tags | actions/setup-node | v4   | v6 |

Author: renovate[bot]

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
         uses: pnpm/action-setup@v4
 
       - name: Setup Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}
           cache: pnpm

.github/workflows/release.yaml

@@ -23,7 +23,7 @@ jobs:
         uses: pnpm/action-setup@v4
 
       - name: Setup node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 22
           cache: "pnpm"