build(deps): bump codecov/codecov-action from 4 to 5

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 4 to 5.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v4...v5)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/pytest.yml

@@ -122,7 +122,7 @@ jobs:
             - name: Upload coverage-stubber-*.xml to Codecov
               if: always() # ignore errors
               continue-on-error: true
-              uses: codecov/codecov-action@v4
+              uses: codecov/codecov-action@v5
               with:
                   file: results/coverage-stubber-${{ matrix.python-version }}-${{ matrix.os }}.xml
                   flags: stubber

.github/workflows/pytest_mpflash.yml

@@ -90,7 +90,7 @@ jobs:
             - name: Upload coverage-mpflash-*.xml to Codecov
               if: always() # ignore errors
               continue-on-error: true
-              uses: codecov/codecov-action@v4
+              uses: codecov/codecov-action@v5
               with:
                   file: results/coverage-mpflash-${{ matrix.python-version }}-${{ matrix.os }}.xml
                   flags: stubber