build(deps): bump actions/checkout from 3.1.0 to 3.2.0 (#34480)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.1.0 to 3.2.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](93ea575cb5...755da8c3cf)

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

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build-containers.yml

@@ -50,7 +50,7 @@ jobs:
     if: github.repository == 'spack/spack'
     steps:
       - name: Checkout
-        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # @v2
+        uses: actions/checkout@755da8c3cf115ac066823e79a1e1788f8940201b # @v2
 
       - name: Set Container Tag Normal (Nightly)
         run: |