build(deps): bump actions/checkout from 2.3.1 to 2.4.0 (#672)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.3.1 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@v2.3.1...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>

.github/workflows/check-docs.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout 🛎️
-        uses: actions/checkout@v2.3.1
+        uses: actions/checkout@v2.4.0
         with:
           persist-credentials: false
           fetch-depth: 0

.github/workflows/link-check.yml

@@ -4,7 +4,7 @@ jobs:
   markdown-link-check:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2.4.0
     - uses: gaurav-nelson/github-action-markdown-link-check@v1
       with:
         config-file: '.github/workflows/link-check-config.json'

.github/workflows/test.yml

@@ -37,7 +37,7 @@ jobs:
       matrix:
         go-arch: ["amd64", "arm", "arm64"]
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.4.0
       - uses: actions/setup-go@v2.1.5
         with:
           go-version: 1.17
@@ -54,7 +54,7 @@ jobs:
   split-test-files:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.4.0
       - name: Create a file with all the pkgs
         run: go list ./... > pkgs.txt
       - name: Split pkgs into 4 files
@@ -85,7 +85,7 @@ jobs:
       matrix:
         part: ["00", "01", "02", "03"]
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.4.0
       - uses: actions/setup-go@v2.1.5
         with:
           go-version: 1.17
@@ -112,7 +112,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: tests
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.4.0
       - uses: technote-space/get-diff-action@v5
         with:
           PATTERNS: |