chore(deps): update actions/checkout action to v5 (#358)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://redirect.github.com/actions/checkout) |
action | major | `v4` -> `v5` |

---

### Release Notes

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

### [`v5`](https://redirect.github.com/actions/checkout/compare/v4...v5)

[Compare
Source](https://redirect.github.com/actions/checkout/compare/v4...v5)

</details>

---

### Configuration

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Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **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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.github/workflows/apollo.yaml

@@ -23,7 +23,7 @@ jobs:
       schema: ${{ env.SCHEMA_FILE }}
       schema_artifact: ${{ env.SCHEMA_ARTIFACT }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Install Rover
         run: |
           curl -sSL https://rover.apollo.dev/nix/latest | sh
@@ -46,7 +46,7 @@ jobs:
     name: Introspect Cargo.toml to get subgraph name
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: Swatinem/rust-cache@v2
       - name: Install cargo-get
         run: cargo install cargo-get

.github/workflows/checks.yaml

@@ -31,7 +31,7 @@ jobs:
     name: Test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: Swatinem/rust-cache@v2
       - name: Test
         run: cargo test