feat: Add React testing library cheatsheet (#8199)

* Add React testing library cheatsheet

* fix: update cheatsheet name

* fix: fix alphabetical ordering

* fix: fix author name

Co-authored-by: LuigiImVector <LuigiImVector@users.noreply.github.com>

* fix: Fix typos

Co-authored-by: LuigiImVector <LuigiImVector@users.noreply.github.com>

Co-authored-by: LuigiImVector <LuigiImVector@users.noreply.github.com>

more/free-programming-cheatsheets.md

@@ -390,6 +390,7 @@
 
 * [Chai CheatSheet](https://devhints.io/chai) - devhints, Rico Santa Cruz (HTML)
 * [Jest CheatSheet](https://devhints.io/jest) - devhints, Rico Santa Cruz (HTML)
+* [React Testing Library CheatSheet](https://testing-library.com/docs/react-testing-library/cheatsheet/) - Kent C. Dodds, et al. (HTML)
 * [What is Unit testing](https://www.guru99.com/unit-testing-guide.html) - Thomas Hamilton (HTML)