chore(deps): update actions/checkout digest to 85e6279 (#494)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| actions/checkout | action | digest | `cbb7224` -> `85e6279` |

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

👻 **Immortal**: This PR will be recreated if closed unmerged. Get
[config
help](https://redirect.github.com/renovatebot/renovate/discussions) if
that's undesired.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC45NC4xIiwidXBkYXRlZEluVmVyIjoiMzguOTQuMSIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

Co-authored-by: cgrindel-self-hosted-renovate[bot] <139595543+cgrindel-self-hosted-renovate[bot]@users.noreply.github.com>

.github/workflows/ci.yml

@@ -144,7 +144,7 @@ jobs:
     env:
       CC: clang
     steps:
-      - uses: actions/checkout@cbb722410c2e876e24abbe8de2cc27693e501dcb
+      - uses: actions/checkout@85e6279cec87321a52edac9c87bce653a07cf6c2
       - uses: cgrindel/gha_set_up_bazel@v1
         with:
           bazel_disk_cache_dir: ""
@@ -170,7 +170,7 @@ jobs:
           - ubuntu-22.04
     runs-on: ${{ matrix.runner }}
     steps:
-      - uses: actions/checkout@cbb722410c2e876e24abbe8de2cc27693e501dcb
+      - uses: actions/checkout@85e6279cec87321a52edac9c87bce653a07cf6c2
       - uses: cgrindel/gha_set_up_bazel@v1
         with:
           bazel_disk_cache_dir: ""