Bump actions/checkout from 2.3.4 to 2.4.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.3.4 to 2.4.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.3.4...v2.4.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/coverage.yml

@@ -29,7 +29,7 @@ jobs:
           - 5432:5432
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.4.0
 
       - name: Install Stable Toolchain
         uses: actions-rs/toolchain@v1.0.7

.github/workflows/test.yml

@@ -28,7 +28,7 @@ jobs:
 
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.4.0
 
       - name: Install stable toolchain
         uses: actions-rs/toolchain@v1.0.7