Bump actions/checkout from 3 to 4 (#312)

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>

.github/workflows/codeql-analysis.yml

@@ -38,7 +38,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/coverage.yml

@@ -19,7 +19,7 @@ jobs:
         std: ["11", "14", "17", "20"]
         unitBase: ["uint64_t", "uint32_t"]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 

.github/workflows/static-analyzers.yml

@@ -14,14 +14,14 @@ jobs:
     container: helics/buildenv:cpplint
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Run cpplint
       run: cpplint --counting=detailed --recursive units test webserver converter  
   cppcheck:
     runs-on: ubuntu-latest
     container: helics/buildenv:cppcheck2
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Run cppcheck
       run: cppcheck --enable=performance,portability,unusedFunction --suppressions-list=config/cppcheck_suppressions.txt --error-exitcode=-4 -i ThirdParty -i FuzzTargets -i docs -i config .

.github/workflows/tests.yml

@@ -13,7 +13,7 @@ jobs:
     name: CMake config check 3.4-3.11
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: update certificates
       run: |
@@ -70,7 +70,7 @@ jobs:
     name: CMake config check 3.12+
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Check CMake 3.12
       uses: ./.github/actions/quick_cmake