build(deps): bump actions/setup-node from 4.1.0 to 6.2.0

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 4.1.0 to 6.2.0.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](39370e3970...6044e13b5d)

---
updated-dependencies:
- dependency-name: actions/setup-node
  dependency-version: 6.2.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/nightly.yml

@@ -29,7 +29,7 @@ jobs:
       with:
         go-version: "^1.25"
     - name: Set up Node.js
-      uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af # v4.1.0
+      uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
       with:
         node-version: "22"
     - name: Run server conformance tests