Bump codecov/codecov-action from 3 to 4 (#42)

* Bump codecov/codecov-action from 3 to 4

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] <support@github.com>

* Add CODECOV_TOKEN to env for codecov action

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Andrew Winters <andrew.ross.winters@liu.se>

.github/workflows/ci.yml

@@ -76,12 +76,14 @@ jobs:
           sudo apt-get install -y lcov
           cd TestSuiteBuild
           FC=${{ matrix.compiler }} ./createcoverage
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         if: ${{ matrix.os == 'ubuntu-latest' }}
         with:
           files: ./TestSuiteBuild/lcov.info
           flags: unittests
           name: codecov-umbrella
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }} # now required for public repos
       - name: Coveralls
         if: ${{ matrix.os == 'ubuntu-latest' }}
         uses: coverallsapp/github-action@master