Update actions/checkout action to v4.2.0 (#370)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://redirect.github.com/actions/checkout) |
action | minor | `v4.1.7` -> `v4.2.0` |

---

### Release Notes

<details>
<summary>actions/checkout (actions/checkout)</summary>

###
[`v4.2.0`](https://redirect.github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v420)

[Compare
Source](https://redirect.github.com/actions/checkout/compare/v4.1.7...v4.2.0)

- Add Ref and Commit outputs by
[@&#8203;lucacome](https://redirect.github.com/lucacome) in
[https://github.com/actions/checkout/pull/1180](https://redirect.github.com/actions/checkout/pull/1180)
- Dependency updates by
[@&#8203;dependabot-](https://redirect.github.com/dependabot-)
[https://github.com/actions/checkout/pull/1777](https://redirect.github.com/actions/checkout/pull/1777),
[https://github.com/actions/checkout/pull/1872](https://redirect.github.com/actions/checkout/pull/1872)

</details>

---

### Configuration

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

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

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

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

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

---

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Author: rpdelaney

.github/workflows/main.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
       - name: Set up Python
         uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.0
         with:
@@ -34,7 +34,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
       - name: Set up Python
         uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.0
         with: