Bump actions/setup-node from 3 to 4 (#822)

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 3 to 4.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](https://github.com/actions/setup-node/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/setup-node
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/autoprefixer.yml

@@ -11,7 +11,7 @@ jobs:
         uses: actions/checkout@v4.1.1
 
       - name: Setup Node
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: "15.x"
 

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
         fetch-depth: 0    # Fetch all history for .GitInfo and .Lastmod
 
     - name: Setup Node
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
         node-version: 16