ruff

27ac34d6 - Rework `S606` (`start-process-with-no-shell`) docs to make clear the security motivations (#13658)

Rework `S606` (`start-process-with-no-shell`) docs to make clear the security motivations (#13658) Helps with #13614. This docs rewrite draws on the [documentation for the original bandit rule](https://bandit.readthedocs.io/en/latest/plugins/b606_start_process_with_no_shell.html).