docs(readme): new github nickname

Author: pietro-bertozzi

README.md

@@ -1,6 +1,6 @@
 # LeetCode
 
 This repository contains my solutions to LeetCode problems, organized by study-plan.  
-A [workflow](https://github.com/BertozziPietro/leetcode/tree/main/.github/workflows) is used to automate the creation of new study-plan folders.
+A [workflow](https://github.com/pietro-bertozzi/leetcode/tree/main/.github/workflows) is used to automate the creation of new study-plan folders.
 
 ![](https://leetcard.jacoblin.cool/pietro-bertozzi?theme=dark&font=Source%20Code%20Pro)