docs: swap travis badge for dependabot

Author: developher-net

README.md

@@ -1,5 +1,5 @@
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
-[![Build Status](https://travis-ci.com/amclin/advent-of-code.svg?branch=master)](https://travis-ci.com/amclin/advent-of-code)
+[![Build Status](https://github.com/amclin/advent-of-code/actions/workflows/release.yml/badge.svg)](https://github.com/amclin/advent-of-code/actions/workflows/release.yml)
 [![codecov](https://codecov.io/gh/amclin/advent-of-code/branch/master/graph/badge.svg)](https://codecov.io/gh/amclin/advent-of-code)
 
 ## Start a boilerplate for a new day