Helm mirror command does not push changes

Currently in the source code of `gitops helm mirror` command there seems to be inconsistent behavior near the end of function. Namely the inputs and comments indicate that `git push` should be executed, but this does not seem to be the case in the code.

In `mirror.go` following block of code is present after the repositories have been mirrored:

```go

changes, err := gitclient.AddAndCommitFiles(o.GitClient, gitDir, o.CommitMessage)
if err != nil {
return errors.Wrapf(err, "failed to add and commit files")
}
if !changes {
log.Logger().Infof("no changes")
return nil
}
if o.NoPush {
return nil
}
err = gitclient.Pull(o.GitClient, gitDir)
if err != nil {
return errors.Wrapf(err, "failed to push changes")
}

log.Logger().Infof("pushed changes to %s in branch %s", info(o.GitURL), info(o.Branch))
return nil
```

The comments indicate that there should be a push, but actually executed is `git pull`. This does not seem correct and should be fixed, since this command may be crucial for people looking to migrate the whole version stream into private repositories