Bump actions/checkout from 3 to 4 (#149)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...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>
Co-authored-by: Maciej Gawinecki <[email protected]>

.github/workflows/badges.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up the Java JDK
         uses: actions/setup-java@v3

.github/workflows/codeql-analysis.yml

@@ -39,7 +39,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/format.yml

@@ -13,7 +13,7 @@ jobs:
   formatting:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3 # v2 minimum required
+      - uses: actions/checkout@v4 # v2 minimum required
         with:
           ref: ${{ github.event.pull_request.head.ref }}
       - uses: axel-op/googlejavaformat-action@v3

.github/workflows/release.yml

@@ -6,7 +6,7 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - id: install-secret-key
         name: Install gpg secret key
         run: |

.github/workflows/test.yml

@@ -21,7 +21,7 @@ jobs:
       max-parallel: 4
     name: Test JDK ${{ matrix.java-version }}, ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up JDK ${{ matrix.java-version }}
         uses: actions/setup-java@v3
         with: