Bump actions/setup-node from 5 to 6 (#1662)

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 5 to 6.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-node
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
           version: latest
 
       - name: Setup Node.js environment
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: "20.x"
           cache: "pnpm"
@@ -45,7 +45,7 @@ jobs:
           version: latest
 
       - name: Setup Node.js environment
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: "20.x"
           cache: "pnpm"
@@ -69,7 +69,7 @@ jobs:
           version: latest
 
       - name: Setup Node.js environment
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: "20.x"
           cache: "pnpm"