chore(deps): bump the actions group with 2 updates (#6093)

* chore(deps): bump the actions group with 2 updates

Bumps the actions group with 2 updates: [actions/checkout](https://github.com/actions/checkout) and [actions/cache](https://github.com/actions/cache).

Updates `actions/checkout` from 4.2.2 to 5.0.0
- [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/v4.2.2...08c6903cd8c0fde910a37f88322edcfb5dd907a8)

Updates `actions/cache` from 4.2.4 to 4.3.0
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/0400d5f644dc74513175e3cd8d07132dd4860809...0057852bfaa89a56745cba8c7296529d2fc39830)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 5.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/cache
  dependency-version: 4.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: actions
...

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

* ci: pin actions/checkout to v4.2.2

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>

.github/workflows/backport.yml

@@ -16,6 +16,7 @@ jobs:
     runs-on: ${{ fromJSON(vars.RUNNER) }}
     container: hashicorpdev/backport-assistant:0.5.1
     steps:
+      # Note: actions/checkout v5 breaks the backport assistant, so we pin to v4.2.2 for now.
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 0 # Fetch all branches and tags