Bump actions/checkout from 2 to 4 (#510)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/check.yml

@@ -10,7 +10,7 @@ jobs:
       fail-fast: false
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Set environment variables
         run: |
@@ -26,7 +26,7 @@ jobs:
         run: python3 -m pip install --upgrade pip setuptools wheel
 
       - name: Clone
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: 'c0rp3n/colorlib-check'
           ref: 'master'

.github/workflows/master.yml

@@ -13,7 +13,7 @@ jobs:
         SM_VERSION: ["1.11", "1.12"]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Install dependencies
         run: sudo apt install curl p7zip-full p7zip-rar

.github/workflows/pull_request.yml

@@ -13,7 +13,7 @@ jobs:
         SM_VERSION: ["1.11", "1.12"]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Set environment variables
         run: |