build(deps): bump actions/checkout from 2.3.5 to 2.4.0

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](https://github.com/actions/checkout/compare/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>

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
       MRUBY_CONFIG: ci/gcc-clang
       CC: gcc
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - name: Ruby version
         run: ruby -v
       - name: Compiler version
@@ -25,7 +25,7 @@ jobs:
       MRUBY_CONFIG: ci/gcc-clang
       CC: clang
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - name: Ruby version
         run: ruby -v
       - name: Compiler version
@@ -40,7 +40,7 @@ jobs:
       MRUBY_CONFIG: ci/gcc-clang
       CC: gcc
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - name: Ruby version
         run: ruby -v
       - name: Compiler version
@@ -55,7 +55,7 @@ jobs:
       MRUBY_CONFIG: ci/gcc-clang
       CC: clang
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - name: Ruby version
         run: ruby -v
       - name: Compiler version
@@ -70,7 +70,7 @@ jobs:
       MRUBY_CONFIG: ci/gcc-clang
       CC: clang
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - name: Ruby version
         run: ruby -v
       - name: Compiler version
@@ -85,7 +85,7 @@ jobs:
       MRUBY_CONFIG: ci/gcc-clang
       CC: gcc
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - name: Ruby version
         run: ruby -v
       - name: Compiler version
@@ -105,7 +105,7 @@ jobs:
       package-dir: C:\cygwin-package
       cache-version: v1
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - uses: actions/cache@v2.1.6
         with:
           path: ${{ env.package-dir }}
@@ -145,7 +145,7 @@ jobs:
     env:
       MRUBY_CONFIG: ci/msvc
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - name: Ruby version
         run: ruby -v
       - name: Build and test

.github/workflows/codeql-analysis.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
         with:
           # We must fetch at least the immediate parents so that if this is
           # a pull request then we can checkout the head.

.github/workflows/lint.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check Out
-        uses: actions/checkout@v2.3.5
+        uses: actions/checkout@v2.4.0
       - name: Install
         run: wget -O - -q https://git.io/misspell | sh -s -- -b .
       - name: Misspell
@@ -17,7 +17,7 @@ jobs:
     name: Run pre-commit
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - name: Check merge conflict
         run: |
           python -m pip install --upgrade pip

.github/workflows/super-linter.yml

@@ -12,7 +12,7 @@ jobs:
     name: Lint Code Base
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - uses: github/super-linter@v4.8.1
         env:
           ERROR_ON_MISSING_EXEC_BIT: true