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] <support@github.com>

Author: dependabot[bot]

.github/workflows/docs-website.yml

@@ -19,7 +19,7 @@ jobs:
 
       - uses: Swatinem/rust-cache@v2
 
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: "20"
 

.github/workflows/test.yml

@@ -53,7 +53,7 @@ jobs:
 
       - uses: Swatinem/rust-cache@v2
 
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: "20"
 
@@ -113,7 +113,7 @@ jobs:
 
       - uses: Swatinem/rust-cache@v2
 
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: "20"
       - uses: awalsh128/cache-apt-pkgs-action@latest