chore(deps): bump codecov/codecov-action from 5 to 6

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>

Author: dependabot[bot]

.github/workflows/test_suite.yaml

@@ -45,7 +45,7 @@ jobs:
       - name: Run Tests
         run: |
           uv run pytest --cov-report xml:./coverage.xml --durations=25
-      - uses: codecov/codecov-action@v5
+      - uses: codecov/codecov-action@v6
         if: matrix.os == 'ubuntu-latest' && success()
         with:
           files: ./coverage.xml # optional

.github/workflows/warnings-tests.yaml

@@ -45,7 +45,7 @@ jobs:
       - name: Run Tests
         run: |
           uv run pytest -Werror --cov-report xml:./coverage.xml --durations=25
-      - uses: codecov/codecov-action@v5
+      - uses: codecov/codecov-action@v6
         if: matrix.os == 'ubuntu-latest' && success()
         with:
           file: ./coverage.xml # optional