Bump actions/checkout from 3 to 4

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] <support@github.com>

.github/workflows/deploy-docs.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Use Node.js LTS 18.x
       uses: actions/setup-node@v3.8.1
@@ -46,7 +46,7 @@ jobs:
         npm run schema-workspace-generate
 
     - name: Checkout gh-pages
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         ref: gh-pages
         path: gh-pages

.github/workflows/github-ci.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Use Node.js LTS 18.x
       uses: actions/setup-node@v3.8.1

.github/workflows/reuse-compliance.yml

@@ -13,6 +13,6 @@ jobs:
     name: Compliance Check
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Execute REUSE Compliance Check
       uses: fsfe/reuse-action@v2

.github/workflows/security-audit.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checkout '${{ matrix.branch }}' branch
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ matrix.branch }}