Updated constructors.md

✅ All writings are my own.
✅ My entry follows the Codecademy Docs style guide.
✅ My changes generate no new warnings.
✅ I have performed a self-review of my own writing and code.
✅ I have checked my entry and corrected any misspellings.
✅ I have made corresponding changes to the documentation if needed.
✅ I have confirmed my changes are not being pushed from my forked main branch.
✅ I have confirmed that I'm pushing from a new branch named after the changes I'm making.
✅ I have linked any issues that are relevant to this PR in the Issues Solved section.

Codecademy / docs