add public repo condition to rules pseudocode

[DetachHead]

Description

added the condition that the PR needs to be in a public repo to the pseudocode in the rules

Test process

looked at the page with my change in it

Requirements to merge

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code in hard-to-understand areas
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes