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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
       - uses: pnpm/action-setup@v3
         with:
           version: 10.18.3
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}
           cache: 'pnpm'

.github/workflows/publish.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: pnpm/action-setup@v3
         with:
           version: 10.18.3
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 'lts/*'
           registry-url: 'https://registry.npmjs.org'