Bump actions/checkout from 3 to 4 (#526)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  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>

.github/workflows/code-quality.yaml

@@ -5,7 +5,7 @@ jobs:
     code-quality:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v3
+            - uses: actions/checkout@v4
 
             - name: Setup Node.js
               uses: actions/setup-node@v3

.github/workflows/demo.yaml

@@ -17,7 +17,7 @@ jobs:
         if: ${{ github.repository_owner == 'wmde' }}
         steps:
             - name: Checkout
-              uses: actions/checkout@v3
+              uses: actions/checkout@v4
             - name: Set up node
               uses: actions/setup-node@v3
               with: