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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -50,7 +50,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v4
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 20
           cache: pnpm
@@ -78,7 +78,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: pnpm/action-setup@v4
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}
           cache: pnpm
@@ -132,7 +132,7 @@ jobs:
       - uses: pnpm/action-setup@v4
 
       - name: Setup node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         if: ${{ !matrix.docker }}
         with:
           node-version: 20
@@ -200,7 +200,7 @@ jobs:
       - uses: pnpm/action-setup@v4
 
       - name: Setup node
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 20
           cache: pnpm