ci: bump actions/checkout from 2.3.5 to 2.4.0 (#246)

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@1e204e9...ec3a7ce)

---
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>

.github/workflows/code_coverage.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@1e204e9a9253d643386038d443f96446fa156a97
+        uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
         with:
           persist-credentials: false
 

.github/workflows/daily_tests.yml

@@ -17,7 +17,7 @@ jobs:
           - nightly
     steps:
       - name: Checkout sources
-        uses: actions/checkout@1e204e9a9253d643386038d443f96446fa156a97
+        uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
         with:
           persist-credentials: false
 

.github/workflows/lints.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@1e204e9a9253d643386038d443f96446fa156a97
+        uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
         with:
           persist-credentials: false
 

.github/workflows/security_audit.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@1e204e9a9253d643386038d443f96446fa156a97
+        uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
         with:
           persist-credentials: false
       - name: Install stable toolchain

.github/workflows/test.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout sources
-        uses: actions/checkout@1e204e9a9253d643386038d443f96446fa156a97
+        uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
         with:
           persist-credentials: false
 
@@ -95,7 +95,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout sources
-        uses: actions/checkout@1e204e9a9253d643386038d443f96446fa156a97
+        uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
         with:
           persist-credentials: false
 
@@ -120,7 +120,7 @@ jobs:
           - stable
           - nightly
     steps:
-    - uses: actions/checkout@1e204e9a9253d643386038d443f96446fa156a97
+    - uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
       with:
         persist-credentials: false
     - uses: actions-rs/toolchain@16499b5e05bf2e26879000db0c1d13f7e13fa3af
@@ -145,7 +145,7 @@ jobs:
           - armv7-unknown-linux-gnueabihf
           - mips64-unknown-linux-gnuabi64
     steps:
-      - uses: actions/checkout@1e204e9a9253d643386038d443f96446fa156a97
+      - uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
         with:
           persist-credentials: false
       - uses: actions-rs/toolchain@16499b5e05bf2e26879000db0c1d13f7e13fa3af
@@ -169,7 +169,7 @@ jobs:
         arch:
           - wasm32-unknown-unknown
     steps:
-      - uses: actions/checkout@1e204e9a9253d643386038d443f96446fa156a97
+      - uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
         with:
           persist-credentials: false
       - uses: actions-rs/toolchain@16499b5e05bf2e26879000db0c1d13f7e13fa3af
@@ -186,7 +186,7 @@ jobs:
     name: Build documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1e204e9a9253d643386038d443f96446fa156a97
+      - uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
         with:
           persist-credentials: false
       - uses: actions-rs/toolchain@16499b5e05bf2e26879000db0c1d13f7e13fa3af
@@ -210,7 +210,7 @@ jobs:
     continue-on-error: ${{ matrix.checks == 'advisories' }}
 
     steps:
-    - uses: actions/checkout@1e204e9a9253d643386038d443f96446fa156a97
+    - uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
       with:
         persist-credentials: false
     - uses: EmbarkStudios/cargo-deny-action@0ca727bbae7b7b578b9a5f98186caac35aa2a00d