Bump actions/checkout from 3.5.2 to 4.2.1

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.5.2 to 4.2.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3.5.2...v4.2.1)

---
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/main.yml

@@ -36,7 +36,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v3.5.2
+      - uses: actions/checkout@v4.2.1
 
       - name: Install dependencies
         run: |
@@ -70,7 +70,7 @@ jobs:
   cppcheck:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3.5.2
+      - uses: actions/checkout@v4.2.1
 
       - name: Install dependencies
         run: |