Update intro.json

[quine-bot[bot]]

👋 Figuring out if a PR is useful is hard, hopefully this will help.

• @Joyin2 has been on GitHub since 2020 and in that time has had 10 public PRs merged
• They haven't contributed to this repo before
• Here's a good example of their work: Runzo-Driver-Registration
• From looking at their profile, they seem to be good with HTML and JavaScript.

Their most recently public accepted PR is: https://github.com/Joyin2/Newbie-Team/pull/9

[Joyin2]

added my intro