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>

.github/workflows/codespell-private.yml

@@ -48,7 +48,7 @@ jobs:
       - run: codespell --help
       - run: codespell --version
       - run: make check
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
       # tomli should not be required for the next two steps (and make sure it's not)
       - run: pip uninstall -yq tomli
         if: ${{ matrix.no-toml == 'no-toml' }}

.github/workflows/codespell-windows.yml

@@ -24,4 +24,4 @@ jobs:
       - run: codespell --help
       - run: codespell --version
       - run: pytest codespell_lib
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4