added Maintainability Badge

Author: DashProsh

README.md

@@ -1,2 +1,5 @@
+[![Maintainability](https://api.codeclimate.com/v1/badges/194629cd817f2f1eb564/maintainability)](https://codeclimate.com/github/DashProsh/java-project-61/maintainability)
+
+
 ### Hexlet tests and linter status:
-[![Actions Status](https://github.com/DashProsh/java-project-61/actions/workflows/hexlet-check.yml/badge.svg)](https://github.com/DashProsh/java-project-61/actions)
+[![Actions Status](https://github.com/DashProsh/java-project-61/actions/workflows/hexlet-check.yml/badge.svg)](https://github.com/DashProsh/java-project-61/actions)