Update actions/setup-node action to v6 (#113)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
         with:
           version: 10
       - name: Install Node
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: 20.x
           cache: pnpm
@@ -45,7 +45,7 @@ jobs:
       - uses: pnpm/action-setup@v4
         with:
           version: 10
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: 20.x
           cache: pnpm
@@ -80,7 +80,7 @@ jobs:
         with:
           version: 10
       - name: Install Node
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: 20.x
           cache: pnpm