Bump actions/setup-node from 1 to 4 (OAI#3443)

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 1 to 4.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v1...v4)

---
updated-dependencies:
- dependency-name: actions/setup-node
  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/schema-tests.yaml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v1 # checkout repo content
-    - uses: actions/setup-node@v1 # setup Node.js
+    - uses: actions/setup-node@v4 # setup Node.js
       with:
         node-version: '14.x'
     - name: Install dependencies

.github/workflows/validate-markdown.yaml

@@ -19,7 +19,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2 # checkout repo content
-    - uses: actions/setup-node@v1 # setup Node.js
+    - uses: actions/setup-node@v4 # setup Node.js
       with:
         node-version: '14.x'
     - name: Validate markdown