build(deps): bump codecov/codecov-action from 5 to 7

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 5 to 7.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-action/compare/v5...v7)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci.yml

@@ -221,7 +221,7 @@ jobs:
       - uses: taiki-e/install-action@cargo-llvm-cov
       - run: cargo llvm-cov --workspace --ignore-run-fail --lcov --output-path lcov.info
         working-directory: freemkv-keysources
-      - uses: codecov/codecov-action@v5
+      - uses: codecov/codecov-action@v7
         with:
           files: freemkv-keysources/lcov.info
           slug: freemkv/freemkv-keysources