Bump codecov/codecov-action from 2 to 3 (#110)

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] <support@github.com>

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

Author: dependabot[bot]

.github/workflows/codecov.yml

@@ -21,4 +21,4 @@ jobs:
           go test -race -coverprofile=coverage.out -covermode=atomic `go list ./... | grep -v vendor/`
 
       - name: Uploading coverage to Codecov
-        uses: codecov/codecov-action@v2
+        uses: codecov/codecov-action@v3