Revert "ci(deps): bump codecov/codecov-action from 3 to 4"

[DomWeldon]

Reverts #846

There appears to be an issue with this release, which is currently still in beta. Suggesting this commit is reverted, as it's causing all new pull requests, including mine, to fail. Can update to v4 once the release is stable.

[codecov]

Codecov Report

Patch coverage is 97.51% of modified lines.

Files Changed	Coverage
commitizen/cli.py	ø
commitizen/git.py	33.33%
commitizen/providers/scm_provider.py	91.17%
commitizen/__version__.py	100.00%
commitizen/commands/bump.py	100.00%
commitizen/commands/commit.py	100.00%
commitizen/defaults.py	100.00%
commitizen/providers/__init__.py	100.00%
commitizen/providers/base_provider.py	100.00%
commitizen/providers/cargo_provider.py	100.00%
... and 5 more

📢 Thoughts on this report? Let us know!.