Add a link to a fix of panels' deactivation

Before, a panel would stay activated even when a new one was clicked. Now it deactivates so that always only one is activated.

Author: filipkowal

readme.md

@@ -52,6 +52,7 @@ Feel free to submit a PR adding a link to your own recaps, guides or reviews!
 * [Eshan Vohra](https://github.com/eshanvohra) is currently doing this challenge. Check out my repo [here](https://github.com/eshanvohra/JavaScript30).
 * [RegusAl](https://github.com/RegusAl) is currently doing this challenge. Check out my repo [here](https://github.com/RegusAl/JavaScript30).
 * [Ayush Gupta's](https://javascript30.ayushgupta.tech/) implementation of JavaScript30 challenge with some add-ons & updated design.
+* [filipkowal](https://github.com/filipkowal/JS30-05-Flex-Panels-Deactivate) Fix to flex panels (5th  day) so the panels deactivate when clicked on another one.
 
 
 ## Alternative Implementations