Update reference to command.GitPath()
In 6cda774b (Removal of command.GitPath(), 2020-11-26) there was a mass migration away from command.GitPath() which missed this one help message. Update it accordingly.
In 6cda774b (Removal of command.GitPath(), 2020-11-26) there was a mass migration away from command.GitPath() which missed this one help message. Update it accordingly.