build(deps): Bump codecov/codecov-action from 5 to 6 (#3217)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 5 to 6.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v5...v6)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/rust-test.yml

@@ -82,7 +82,7 @@ jobs:
         run: cargo llvm-cov --workspace --lcov --output-path lcov.info
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
           files: lcov.info
           flags: rust

.github/workflows/test.yml

@@ -139,7 +139,7 @@ jobs:
           name: integration-test-coverage-report-${{ github.sha }}
           path: ./integration-coverage
       - name: Upload combined coverage report
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./unit-coverage/coverage.txt,./integration-coverage/coverage.txt