build(deps): bump actions/checkout from 1 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 1 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v1...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/failsafe_sim.yml

@@ -24,7 +24,7 @@ jobs:
       image: px4io/px4-dev-nuttx-focal:2021-09-08
       options: --privileged --ulimit core=-1 --security-opt seccomp=unconfined
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
       with:
         token: ${{ secrets.ACCESS_TOKEN }}