Bump actions/checkout from 3 to 4

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]>

.github/workflows/build.yaml

@@ -13,7 +13,7 @@ jobs:
         - { cc: gcc, cxx: g++, coverage: false }
         - { cc: gcc, cxx: g++, coverage: true }
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install Qt
       run: |
         sudo apt-mark hold grub-efi-amd64-signed
@@ -93,7 +93,7 @@ jobs:
         - { cc: gcc, cxx: g++, coverage: false }
         - { cc: gcc, cxx: g++, coverage: true }
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install Tools
       run: |
         sudo apt-mark hold grub-efi-amd64-signed
@@ -188,7 +188,7 @@ jobs:
           - { qt: '6.5.2', env: { cc: gcc-12 } }
           - { qt: '6.6.0', env: { cc: gcc-12 } }
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install lcov
       run: brew install lcov
     - name: Install Qt
@@ -311,7 +311,7 @@ jobs:
         - { generator: 'NMake Makefiles', tool: msvc,  dll:    QtPokit.dll }
         - { generator: 'MinGW Makefiles', tool: mingw, dll: libQtPokit.dll }
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install host Qt for cross-compilation
       if: matrix.arch == 'arm64'
       uses: jurplel/install-qt-action@v3
@@ -390,7 +390,7 @@ jobs:
     needs: [ linux0, linux, mac, win ]
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install lcov
       run: |
         sudo apt-mark hold grub-efi-amd64-signed
@@ -440,7 +440,7 @@ jobs:
     if: success() && (github.ref == 'refs/heads/main')
     needs: collate-test-results
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with: { ref: doc }
     - name: Clear previous coverage report
       run: rm -rf main/cov

.github/workflows/docs.yaml

@@ -9,7 +9,7 @@ jobs:
   generate:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         submodules: true
     - name: Install Doxygen
@@ -43,7 +43,7 @@ jobs:
     if: success() && (github.ref == 'refs/heads/main')
     needs: generate
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with: { ref: doc }
     - name: Clear previous docs
       run: rm -rf main/{doc,int}

.github/workflows/sonar.yaml

@@ -18,7 +18,7 @@ jobs:
         - { cc: clang, cxx: clang++ }
         - { cc: gcc, cxx: g++ }
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - name: Install Qt

.github/workflows/static.yaml

@@ -7,7 +7,7 @@ jobs:
     if: github.actor != 'dependabot[bot]'
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install Qt
       run: |
         sudo apt-mark hold grub-efi-amd64-signed
@@ -34,7 +34,7 @@ jobs:
         sudo apt update
         sudo apt upgrade
         sudo apt install cppcheck
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Perform Cppcheck Analysis
       run: ./.cppcheck.sh --xml --xml-version=2 2> "$RUNNER_TEMP/cppcheck.xml"
     - name: Generate Report