Bump actions/setup-node from 3 to 6

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 3 to 6.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v3...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] <[email protected]>

Author: dependabot[bot]

.github/workflows/build-search.yml

@@ -23,7 +23,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: '20' 
 

.github/workflows/check-build.yml

@@ -31,7 +31,7 @@ jobs:
           uv python install 3.12 --verbose
       - name: Setup md-lint environment
         if: matrix.check_type == 'md-lint'
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v6
         with:
           node-version: 20
       - name: Install markdownlint-cli2

.github/workflows/pull-request.yaml

@@ -24,7 +24,7 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Set up Node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v6
         with:
           node-version: '20'  # Adjust Node.js version as needed
           cache: 'yarn'       # Cache yarn dependencies