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] <support@github.com>

Author: dependabot[bot]

.github/workflows/docs.yaml

@@ -50,7 +50,7 @@ jobs:
           sudo apt-get install pandoc doxygen -y
 
       - name: Set up Node
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: 20
           cache: 'yarn'

.github/workflows/main.yml

@@ -243,7 +243,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v5
       - name: Set up Node
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: 20
           cache: 'yarn'

.github/workflows/release.yml

@@ -35,7 +35,7 @@ jobs:
         uses: julia-actions/setup-julia@v2
 
       - name: Set up Node
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: 20
           cache: "yarn"
@@ -130,7 +130,7 @@ jobs:
           skip-existing: true
 
       - name: Set up Node
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: 20
           registry-url: 'https://registry.npmjs.org'