chore(deps): bump actions/checkout from 3 to 4 (#560)

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](https://github.com/actions/checkout/compare/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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: TwiN <twin@linux.com>

.github/workflows/benchmark.yml

@@ -25,6 +25,6 @@ jobs:
           go-version: 1.19
           repository: "${{ github.event.inputs.repository || 'TwiN/gatus' }}"
           ref: "${{ github.event.inputs.ref || 'master' }}"
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Benchmark
         run: go test -bench=. ./storage/store