Bump actions/setup-node from 5 to 6 (#1233)

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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Setup Node
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: '20'
           cache: 'npm'

.github/workflows/deploy-to-gh-pages.yml

@@ -8,7 +8,7 @@ jobs:
     steps:
     - uses: actions/checkout@v5
 
-    - uses: actions/setup-node@v5
+    - uses: actions/setup-node@v6
       with:
         node-version: '20'
 

.github/workflows/linter.yml

@@ -14,7 +14,7 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v5
 
-    - uses: actions/setup-node@v5
+    - uses: actions/setup-node@v6
       with:
         node-version: '20'