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] <[email protected]>

Author: dependabot[bot]

.github/workflows/pr_closed.yaml

@@ -46,7 +46,7 @@ jobs:
         uses: actions/[email protected]
 
       - name: Setup NodeJS
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: ${{ inputs.nodejs_version }}
 
@@ -79,7 +79,7 @@ jobs:
       - name: "Checkout code"
         uses: actions/[email protected]
       - name: Setup NodeJS
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: ${{ inputs.nodejs_version }}
       - name: "Install dependencies"
@@ -105,7 +105,7 @@ jobs:
         uses: actions/[email protected]
 
       - name: Setup NodeJS
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: ${{ inputs.nodejs_version }}
           registry-url: 'https://npm.pkg.github.com'