Bump actions/setup-node from 3 to 4 (#642)

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 3 to 4.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v3...v4)

---
updated-dependencies:
- dependency-name: actions/setup-node
  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>

.github/workflows/docs.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           cache: npm
           node-version: 18

.github/workflows/main.yml

@@ -34,7 +34,7 @@ jobs:
           TOKEN: "${{ github.event_name == 'push' && endsWith(github.ref, 'develop') && matrix.ros_distro == 'noetic' && secrets.RWT_BOT_PAT || github.token }}"
         with:
           token: ${{ env.TOKEN }}
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           cache: npm
           node-version: ${{ matrix.node_version }}