ci: bump actions/checkout from 3 to 4 (#5650)

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>

.github/workflows/pr_triage.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       # Grab sources to get latest labeler.yml
       - name: Fetch sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
            # Ensure we pin the source origin as pull_request_target run under forks.
            fetch-depth: 0
@@ -22,7 +22,7 @@ jobs:
            ref: master
 
       - name: Checkout Ryujinx-Mako
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
             repository: Ryujinx/Ryujinx-Mako
             ref: master