Update README.md

Author: iilj

README.md

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 # yukicoder-problems
 
-[![Build Status](https://travis-ci.com/iilj/yukicoder-problems.svg?branch=master)](https://travis-ci.com/iilj/yukicoder-problems)
+[![Build and Deploy](https://github.com/iilj/yukicoder-problems/actions/workflows/main.yml/badge.svg)](https://github.com/iilj/yukicoder-problems/actions/workflows/main.yml)
+
 
 ## Overview