MAINT: Bump codecov/codecov-action from 3 to 4 (#4165)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3 to 4.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3...v4)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  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: Maxime Rey <[email protected]>

.github/workflows/unit_test_prerelease.yml

@@ -73,7 +73,7 @@ jobs:
           Set-Item -Path env:PYTHONMALLOC -Value "malloc"
           pytest --tx 6*popen --durations=50 --dist loadfile -v --cov=pyaedt  --cov-report=xml --junitxml=junit/test-results.xml --cov-report=html _unittest
 
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         if: matrix.python-version == '3.8'

.github/workflows/unit_tests.yml

@@ -76,7 +76,7 @@ jobs:
             Set-Item -Path env:PYTHONMALLOC -Value "malloc"
             pytest --durations=50 -v --cov=pyaedt --cov-report=xml --cov-report=html --junitxml=junit/test-results.xml _unittest_solvers
 
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         with:
@@ -139,7 +139,7 @@ jobs:
             Set-Item -Path env:PYTHONMALLOC -Value "malloc"
             pytest -n 6 --dist loadfile --durations=50 -v --cov=pyaedt --cov-report=xml --cov-report=html --junitxml=junit/test-results.xml _unittest
 
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         with: