chore(deps): update actions/checkout action to v4 (#52)

| datasource  | package          | from | to |
| ----------- | ---------------- | ---- | -- |
| github-tags | actions/checkout | v3   | v4 |

Co-authored-by: dreadnode-renovate-bot[bot] <184170622+dreadnode-renovate-bot[bot]@users.noreply.github.com>

Author: dreadnode-renovate-bot[bot]

.github/workflows/test.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build
       run: cargo build --verbose
     - name: Run tests