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/automerge.yml

@@ -20,7 +20,7 @@ jobs:
       issues: write
     steps:
       - name: Clone repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Fetch Dependabot metadata
         id: metadata

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
       contents: read
     steps:
       - name: Clone repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup Node.js
         uses: actions/setup-node@v3
@@ -60,7 +60,7 @@ jobs:
       cancel-in-progress: false
     steps:
       - name: Clone repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup GitHub Pages
         id: setup-pages
@@ -96,7 +96,7 @@ jobs:
       cancel-in-progress: false
     steps:
       - name: Clone repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Download browser artifact
         uses: actions/download-artifact@v3

.github/workflows/codeql.yml

@@ -20,7 +20,7 @@ jobs:
       security-events: write
     steps:
       - name: Clone repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v2