CLI name is ambiguous, because both cyclonedx-cli and cyclonedx are used in document #297

Hi, I have a feedback.

I think the CLI name is ambiguous, because both cyclonedx-cli and cyclonedx are used in README.

So how about unifying the command name either cyclonedx-cli and cyclonedx in the document?

When we install the CLI with Homebrew, the command name is not cyclonedx-cli but cyclonedx,
so maybe cyclonedx is preferred.