Bump actions/setup-node from 4 to 6

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 4 to 6.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v4...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>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
       - run: curl -sSf https://rye.astral.sh/get | RYE_INSTALL_OPTION="--yes" bash
       - run: echo "$HOME/.rye/shims" >> $GITHUB_PATH
       - run: rye config --set-bool behavior.use-uv=true