build(deps): Bump actions/checkout from 2.3.5 to 2.4.0 (#2326)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.3.5 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@v2.3.5...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>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Max Inden <mail@max-inden.de>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
       with:
         access_token: ${{ github.token }}
 
-    - uses: actions/checkout@v2.3.5
+    - uses: actions/checkout@v2.4.0
 
     - uses: Swatinem/rust-cache@v1.3.0
       with:
@@ -55,7 +55,7 @@ jobs:
       with:
         access_token: ${{ github.token }}
 
-    - uses: actions/checkout@v2.3.5
+    - uses: actions/checkout@v2.4.0
 
     - name: Install Rust ${{ matrix.toolchain }}
       uses: actions-rs/toolchain@v1.0.7
@@ -93,7 +93,7 @@ jobs:
       with:
         access_token: ${{ github.token }}
 
-    - uses: actions/checkout@v2.3.5
+    - uses: actions/checkout@v2.4.0
 
     - uses: Swatinem/rust-cache@v1.3.0
 
@@ -109,7 +109,7 @@ jobs:
       with:
         access_token: ${{ github.token }}
 
-    - uses: actions/checkout@v2.3.5
+    - uses: actions/checkout@v2.4.0
 
     - uses: actions-rs/toolchain@v1.0.7
       with:
@@ -137,7 +137,7 @@ jobs:
       with:
         access_token: ${{ github.token }}
 
-    - uses: actions/checkout@v2.3.5
+    - uses: actions/checkout@v2.4.0
 
     - uses: Swatinem/rust-cache@v1.3.0
 
@@ -153,7 +153,7 @@ jobs:
       with:
         access_token: ${{ github.token }}
 
-    - uses: actions/checkout@v2.3.5
+    - uses: actions/checkout@v2.4.0
 
     - uses: actions-rs/toolchain@v1.0.7
       with: