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] <[email protected]>

.github/workflows/code-review.yml

@@ -15,7 +15,7 @@
       steps:
 
         - name: Checkout code
-          uses: actions/checkout@v3
+          uses: actions/checkout@v4
           with:
             fetch-depth: 0
 

.github/workflows/hugo-build-pr-check.yml

@@ -37,7 +37,7 @@ jobs:
         run: sudo snap install dart-sass-embedded
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive
           fetch-depth: 0

.github/workflows/hugo-site-build.yml

@@ -44,7 +44,7 @@ jobs:
         run: sudo snap install dart-sass-embedded
 
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive
           fetch-depth: 0