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]>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -58,7 +58,7 @@ jobs:
         run: pixi run -e ${{ matrix.environment }} test -m "unit or (not integration and not end_to_end)" --cov-report=xml -n auto
 
       - name: Upload unit test coverage reports to Codecov with GitHub Action
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           flags: unit
 
@@ -67,6 +67,6 @@ jobs:
         run: pixi run -e ${{ matrix.environment }} test -m end_to_end --cov-report=xml -n auto
 
       - name: Upload end_to_end test coverage reports to Codecov with GitHub Action
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           flags: end_to_end