build(deps): 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/run_tests.yml

@@ -31,7 +31,7 @@ jobs:
         wget --no-verbose https://root.cern/download/root_v6.22.06.Linux-ubuntu20-x86_64-gcc9.3.tar.gz
         sudo tar xf root_v6.22.06.Linux-ubuntu20-x86_64-gcc9.3.tar.gz
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Run tests
       run: |