Fix docker scan help command

[attiasas]

• [ ] All tests have passed. If this feature is not already covered by the tests, new tests have been added.
• [ ] The pull request is targeting the master branch.
• [ ] The code has been validated to compile successfully by running go vet ./....
• [ ] The code has been formatted properly using go fmt ./....

---

Depends on:

• https://github.com/jfrog/jfrog-cli-core/pull/1482
• https://github.com/jfrog/jfrog-cli-security/pull/601

---

Fixes issue where the help usage of docker scan command is not printing correctly

Before:

After:

[github-actions[bot]]

---

🐸 JFrog Frogbot