Bump actions/checkout from 3.5.0 to 3.5.2 (dart-lang/lints#116)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.5.0 to 3.5.2.
- [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/8f4b7f84864484a7bf31766abe9204da3cbe65b3...8e5e7e5ab8b370d6c329ec480221332ada57f0ab)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/pkgs/lints/.github/workflows/validate.yml b/pkgs/lints/.github/workflows/validate.yml
index 19752be..cc21693 100644
--- a/pkgs/lints/.github/workflows/validate.yml
+++ b/pkgs/lints/.github/workflows/validate.yml
@@ -21,7 +21,7 @@
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3
+      - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab
 
       - name: Check for sources
         run: |