chore(deps): update actions/checkout digest to 9bb5618 (#56)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://togithub.com/actions/checkout) | action |
digest | `b4ffde6` -> `9bb5618` |

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.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
   macos_build:
     runs-on: macos-11.0
     steps:
-    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
+    - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4
     - uses: cgrindel/gha_set_up_bazel@v1
       with:
         repo_name: github_snippets