Add rule: Do you know how to add a README.md to your GitHub Profile?

[robweitzssw]

1. What triggered this change? Adding a companion rule to "Do you have an awesome README?" - that rule covers repo READMEs, but says nothing about your GitHub profile README, which is what a recruiter or client sees first.
2. What was changed? New rule at public/uploads/rules/github-profile-readme/rule.mdx, plus 3 screenshots. Added a related link from awesome-readme to the new rule.
3. I paired or mob programmed with: n/a

[github-actions]

⚠️ Category Index Sync Required

One or more category index files are out of sync with the rules in this PR.

Because this PR is from a fork, the bot cannot push the fix automatically. Please update the following file(s) to bring the index list in the frontmatter in sync:

• categories/software-engineering/rules-to-better-architecture-and-code-review.mdx

[github-actions]

Howzit @robweitzssw,

This PR has been here a while.

Did you know you should avoid merge debt?

1. Please action (e.g. get a review) and merge or close

Thanks!