chore(deps): bump actions/setup-node from 5 to 6

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] <[email protected]>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -34,7 +34,7 @@ jobs:
     runs-on: ${{ fromJSON(vars.CI_BUILD_RUNS_ON || '"ubuntu-latest"') }}
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version-file: '.tool-versions'
       - env:
@@ -57,7 +57,7 @@ jobs:
     runs-on: "ubuntu-latest"
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version-file: '.tool-versions'
       - run: npm ci --no-audit --progress=false
@@ -146,7 +146,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Setup node
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version-file: '.tool-versions'
       - name: Retrieve signed artifacts