Upgrade codecov orb in circleci (#3945)
Upgrade codecov orb in circleci (#3945)

The only reason for this upgrade is to see if it will fix codecov
pushing the coverage many times to PRs, which is cluttering the PRs.

The reason for this change is that it is possible that "pushing many
times" is related to codecov internals so upgrading can help.
citusdata/citus,citusdata/citus,citusdata/citus,citusdata/citus,citusdata/citus