Bump codecov/codecov-action from 2 to 3 (#2884)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 2 to 3.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v2...v3)

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

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

.github/workflows/main.yml

@@ -69,7 +69,7 @@ jobs:
           # DATABASE_URL: postgres://postgres:postgres@db:5432/onlineweb4
         run: poetry run tox -e tests
 
-      - uses: codecov/codecov-action@v2
+      - uses: codecov/codecov-action@v3
 
   lint-python:
     runs-on: ubuntu-latest