Bump codecov/codecov-action from 3 to 4 (#1816)

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>

.github/workflows/CI.yml

@@ -172,7 +172,7 @@ jobs:
           pytest -v --no-cov --doctest-modules --ignore-glob='openff/toolkit/_tests/test_*' --ignore=openff/toolkit/data/ --ignore=openff/toolkit/utils/utils.py openff/
 
       - name: Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           file: ./coverage.xml

.github/workflows/beta_rc.yaml

@@ -85,7 +85,7 @@ jobs:
           pytest -v --doctest-glob="docs/*.rst" --doctest-glob="docs/*.md" docs/
 
       - name: Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           file: ./coverage.xml