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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v4
       - name: Use Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 18
           cache: 'pnpm'
@@ -28,7 +28,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v4
       - name: Use Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 18
           cache: 'pnpm'
@@ -43,7 +43,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v4
       - name: Use Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 18
           cache: 'pnpm'