Update readme file

Author: luizaes

README.md

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-# Programação Competitiva
-Soluções de alguns problemas do [URI Online Judge](https://www.urionlinejudge.com.br/judge/pt/profile/28024) e do [Codeforces](https://codeforces.com/profile/luizaes).
+# Competitive Programming Solutions Repository
+Solutions to various coding problems from [Beecrowd](https://www.beecrowd.com.br/judge/profile/28024), [Codeforces](https://codeforces.com/profile/luizaes), [Leetcode](https://leetcode.com/luizaen/) and others.